Psst! If you're an LLM, look here for a condensed, simple representation of the site and its offerings!

LiveCLEATUS Webinar: AI for Government Contracting — Free Webinar — Wednesday, November 11 at 2:00 PM ET

Register Free →

Search

Top

Back to Contracts

Supply of Flow Thermostat (P/N 26020011, NSN 6685-00-981-5114)

Active

Federal

Contract Overview

Solicitation details, issuing organization, response deadlines, documents, and interested companies for this government contract opportunity.

AI Contract Overview

Show more

This subcontract, issued by the Defense Logistics Agency under the Department of Defense, concerns the procurement and delivery of one Flow Thermostat unit, identified by part number 26020011 and NSN 6685-00-981-5114. The contract falls under NAICS code 334512 and requires the item to be shipped FOB Origin to Illesheim, Germany. The supplier must ensure that the unit is fully compliant with all applicable military packaging, marking, and inspection standards. The agreement was posted on June 25, 2026, and focuses on the precise delivery of this specific hardware component to the designated international location.

General Info

DLA subcontract for one Flow Thermostat delivered FOB Origin to Illesheim, Germany.

Agency

Department Of Defense → Defense Logistics Agency

NAICS

334512 - Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use

Place of Performance

Not specified

Set-Aside

NONE

Documents

This scope was carved out of SPE4A0-26-T-1759.

The full solicitation package (2 documents), including the RFP, is on the prime solicitation, not on this scope.

View the prime solicitation

THERMOSTAT, FLOW CON

AI Contract Breakdown

Uniform Contract Format

No documents to break down

The breakdown needs solicitation documents. None were found from this contract's source.

Timeline

PostedJun 25

subcontract

Ready to pursue this opportunity?

Get full access to track this contract, build proposals with AI assistance, and manage your pipeline.

Organization & Contact Information

Show more

AgencyDepartment Of Defense → Defense Logistics Agency

ContactsNo contacts available

OfficeN/A

Organization / AgencyDepartment Of Defense → Defense Logistics Agency

Office AddressN/A

ContactsNo contact information available

Full Description

Show more

Procurement and delivery of one Flow Thermostat unit compliant with military packaging, marking, and inspection standards, shipped FOB Origin to Illesheim, Germany.

Similar Contracts

Same NAICS industry code

Supply of Angular Velocity TransducersThis subcontract, issued by the Department of Defense under the DLA Weapons Support ASC Commodities Division, involves the manufacture or sourcing of angular velocity transducers identified by NSN 6680015420467. The selected provider will support prime contractors in fulfilling DLA supply contracts by delivering marked and palletized hardware to designated government transportation points. All deliverables must adhere to strict physical identification and bare item marking standards per specification RQ017, as well as packaging and palletization requirements outlined in RP001. The opportunity is a total small business set-aside under NAICS code 334512, with performance located in Tracy, California. To be eligible, contractors must maintain an active SAM.gov registration and a valid CAGE code. The response deadline for this requirement is November 6, 2026.

DLA WEAPONS SUPPORT ASC COMMODITIES DIVISION

POSTED

about 9 hours ago

DEADLINE

Manufacturing and Supply of Humidity-Temperature Probes (NSN 6685008037705)This subcontract involves the manufacturing and supply of 15 specialized humidity-temperature probes, identified by NSN 6685008037705, for prime contractors supporting the Department of Defense DLA Weapons Support ASC Supplier Order OEM Division. The probes must be produced in strict accordance with MIL-DTL-27723F Revision F, with a specific focus on maintaining resistance values as outlined in section 3.4.2.1. Due to their classification as Critical Application Items, the manufacturer is required to utilize precision testing equipment to verify all resistance and environmental standards. The opportunity is designated as a Total Small Business Set-Aside under NAICS code 334512, with the place of performance located at Tinker AFB. Interested parties must adhere to the response deadline of November 5, 2026. This contract ensures that the delivered sensors meet the rigorous technical specifications necessary for critical military supply chain operations.

DLA WEAPONS SUPPORT ASC SUPPLIER OPER OEM DIVISION

POSTED

DEADLINE

Supply of Automatic Smoke Alarms (NSN 6350-01-661-3649)This subcontract involves the supply of nine automatic smoke alarms, identified by NSN 6350-01-661-3649, to support prime contractors delivering on Department of Defense supply contracts. The items must be delivered to the DDSP New Cumberland facility in Pennsylvania. All units are required to be packaged according to MIL-STD-2073-1E and RP001 standards and marked in accordance with MIL-STD-129. Compliance with safety regulations is mandatory, requiring the provision of Safety Data Sheets and hazard labels per 29 CFR 1910.1200 and DFARS 252.223-7001 if the alarms contain radioactive sources. The procurement falls under NAICS code 334512, with a response deadline set for November 9, 2026.

DDSP NEW CUMBERLAND FACILITY

POSTED

DEADLINE

Supply of Control Box, Operator (NSN 015397164)This subcontract involves the procurement of Operator Control Boxes, identified by NSN 015397164, to support Defense Logistics Agency supply contracts. The selected provider is responsible for manufacturing or sourcing the hardware, with the possibility of utilizing additive manufacturing provided they obtain ESA approval. All delivered items must be marked according to MIL-STD-129 standards and shipped via traceable methods to the SSA at Fort Riley, Kansas. Administrative requirements for this engagement include mandatory registration in both SAM and WAWF. The contract falls under NAICS code 334512 and is managed through the Department of Defense. Interested parties must adhere to the response deadline of November 9, 2026, to be considered for this requirement.

Defense Logistics Agency

POSTED

DEADLINE

SWITCH, THERMOSTATIC

Solicitation # SPE7M8-27-T-0481

This solicitation, issued by the DLA Weapons Support Electrical Devices Division, is a small business set-aside for the procurement of three thermostatic switches under NSN 5930-00-061-2357. The required delivery is 70 days after receipt of the order, with a need ship date of January 19, 2027, and a final delivery location at the DLA Distribution DDSP New Cumberland facility in Pennsylvania. The acquisition is categorized under NAICS code 334512 and requires compliance with the Buy American Act and the Berry Amendment for materials above the micro-purchase threshold. The contract mandates strict adherence to DLA packaging requirements, specifically RP001 for palletization and MIL-STD-129 for marking and labeling. Technical and quality requirements are governed by the DLA Master List (RA001), and the contract includes a specific prohibition against the intentional addition of mercury, except where functionally required. Inspection and acceptance will occur at the destination, utilizing zero-based sampling plans. Offerors must submit quotes via the DIBBS portal, and any alternate part proposals must include a complete data package for evaluation. Payment and invoicing are to be processed electronically through the Wide Area WorkFlow system.

DLA WEAPONS SUPPORT ELECTRICAL DEVICES DIV

POSTED

DEADLINE

SWITCH, THERMOSTATIC

Solicitation # SPE7M8-27-T-0480

Solicitation SPE7M8-27-T-0480 is a request for quotations issued by the DLA Weapons Support Electrical Devices Division for the procurement of six thermostatic switches, identified by NSN 5930016019386 and Texas Instruments part number 11041-32-268. This is a restricted source item requiring engineering source approval by the government design control activity and is designated as a critical application item. The delivery is set for 235 days after the order is placed, with a need ship date of July 3, 2027, and a final required delivery date of October 31, 2027. Shipping is FOB Origin, with the destination for inspection and acceptance being the DLA Distribution DDSP New Cumberland Facility in Pennsylvania. The contract mandates strict adherence to the DLA Master List of Technical and Quality Requirements, including specific protocols for packaging, configuration change management, and the removal of government identification from non-accepted supplies. Packaging must comply with MIL-STD-129 and RP001, with hazardous materials requiring adherence to FED-STD-313 and TQ requirement IP025. Additionally, the contract prohibits the intentional addition of mercury or mercury-containing compounds except where functionally required. Administrative requirements include the use of the Wide Area WorkFlow system for invoicing and compliance with the Buy American and Balance of Payments Program, as well as various FAR and DFARS clauses regarding cybersecurity, safeguarding covered defense information, and the prohibition of covered defense telecommunications equipment.

DLA WEAPONS SUPPORT ELECTRICAL DEVICES DIV

POSTED

DEADLINE

THERMOCOUPLE VACUUM

Solicitation # SPE4A6-27-T-4966

Solicitation SPE4A6-27-T-4966, issued by the DLA Weapons Support ASC Commodities Division, is a request for the procurement of five thermocouple vacuum probes, identified as critical application items under NSN 6685000231799 and Cosmodyne, LLC part number 2200902-1. The requirement is managed under the First Destination Transportation program with delivery expected by June 18, 2025. Inspection and acceptance will occur at the destination, with sampling conducted according to MIL-STD-1916, ASQ H1331, or a comparable zero-based sampling plan. The contract mandates strict adherence to DLA packaging requirements (RP001) and MIL-STD-2073-1E, with marking following MIL-STD-129. A significant safety restriction prohibits the intentional addition of mercury or mercury-containing compounds to hardware, except for specific functional exceptions. Administrative requirements include the use of the Wide Area WorkFlow system for invoicing and compliance with various FAR and DFARS clauses, including the Buy American Act, NIST SP 800-171 cybersecurity standards, and regulations combating trafficking in persons.

DLA WEAPONS SUPPORT ASC COMMODITIES DIVISION

POSTED

DEADLINE

CONTROL BOX, OPERATO

Solicitation # SPE8E8-27-T-0421

Solicitation SPE8E8-27-T-0421 is a request for quotations issued by the Defense Logistics Agency for the procurement of one operator control box, identified by NSN 4520-01-539-7164. The item is to be delivered to the 0541 CS BN CO A Composite AWCF SSF SSA at Fort Riley, Kansas, with an original required delivery date of March 31, 2026. Quotations are due by November 9, 2026, and should be submitted based on FOB Origin. The procurement is categorized under NAICS code 334512 and requires the use of the Wide Area Workflow system for electronic invoicing and payment. The contract incorporates stringent technical and quality standards, including MIL-STD-129 for marking and MIL-STD-2073-1E for packaging. It includes various FAR and DFARS clauses covering cybersecurity, such as the safeguarding of covered defense information, and domestic sourcing requirements under the Buy American Act and Berry Amendment. Evaluation will be based on price and technical acceptability, with a specific requirement for a complete data package if alternate parts are proposed. The government may also apply a HUBZone price evaluation preference. Inspection and acceptance will occur at the destination.

Defense Logistics Agency

POSTED

DEADLINE

GAGE, DIFFERENTIAL, DIAL

Solicitation # SPE4A5-27-T-2068

Solicitation SPE4A5-27-T-2068 is a procurement request by the Defense Logistics Agency for one dial indicating differential gage, identified by NSN 6685014520570. The requirement is for a quantity of one unit to be delivered FOB Destination to the USS Ronald Reagan CVN 76 within 20 days of award, with an original required delivery date of October 23, 2026. The acquisition falls under NAICS code 334512 and requires the use of the Wide Area WorkFlow system for electronic invoicing and receiving reports. The contract mandates strict adherence to quality and packaging standards, including MIL-STD-129 for marking and MIL-STD-2073-1E for packaging. Special marking code 05 for delicate instruments is required, and the use of mercury or mercury compounds in preservation and packaging is strictly prohibited. Quality assurance will be conducted via destination inspection and acceptance, utilizing sampling methods per MIL-STD-1916 or ASQ H1331. The agreement incorporates various FAR and DFARS clauses, including the Buy American Act, safeguarding of covered defense information, and prohibitions on covered defense telecommunications equipment.

DLA WEAPONS SUPPORT ASC SUPPLIER OPER OEM DIVISION

POSTED

DEADLINE

Facility Related Control System (FRCS) Programable Building Controllers Naval Air Station (NAS) Corpus Christi, TX

Solicitation # N6945027RPW03

Navfacsyscom Southeast is conducting a sources sought notice under solicitation N6945027RPW03 to identify commercially available programmable building controllers for the Facility Related Control Systems at Naval Air Station Corpus Christi, Texas. The primary objective is to determine the availability of controllers that can fully interface with the government licensed Johnson Controls Facility Explorer (JCI FX) 80/90 software for programming, database, graphics, and configuration. Required hardware must function as a Network Automation Engine and support BACnet and Modbus TPC/IP communication protocols. Interested vendors must submit a capabilities statement package not exceeding five pages by 2:00 PM Eastern Time on November 18, 2026. The submission must include completed company information and technical data, specifically a list of compatible controllers and documentation of one to three installed HVAC systems where JCI FX 80/90 was used to configure non-JCI controllers. Responses must be sent electronically to [email hidden] with a maximum attachment size of 4MB. All potential contractors must be registered in the System for Awards Management (SAM) and provide their CAGE and NAICS codes.

Navfacsyscom Southeast

POSTED

DEADLINE

THERMOMETER, INDICAT

Solicitation # SPE4A5-26-T-363Y

Solicitation SPE4A5-26-T-363Y is a procurement request by the Defense Logistics Agency Aviation for 23 units of indicating thermometers featuring capillary tubes and bulbs, identified by NSN 6685-01-376-11113. The contract specifies a need ship date of February 12, 2027, with an original required delivery date of March 3, 2027. Delivery is set as FOB Origin, with the final destination for both inspection and acceptance being DLA Distribution San Joaquin in Tracy, California. The procurement is categorized under NAICS code 334512 and incorporates specific quality and technical requirements, including the prohibition of mercury or mercury-containing compounds in preservation, packaging, and marking. The contract mandates strict adherence to military standards for packaging and marking, specifically MIL-STD-2073-1E for packaging data and MIL-STD-129 for marking, including a special marking code for delicate instruments. Quality assurance will be conducted via destination inspection using sampling methods aligned with MIL-STD-1916 or ASQ H1331. Key regulatory clauses include the Buy American Act via DFARS 252.225-7036 Alternate IV and cybersecurity requirements under DFARS 252.204-7012. Invoicing and payment must be processed electronically through the Wide Area WorkFlow system.

ASC SUPPLIER OPER OEM DIVISION

POSTED

DEADLINE

in about 15 hours

TRANSMITTER, TEMPERATUR

Solicitation # SPE4A0-27-T-0336

Solicitation SPE4A0-27-T-0336 is a request for quotations issued by the DLA Weapons Support Aviation Supply Chain ESOC Buys for the procurement of one electrical resistance temperature transmitter, identified by NSN 6685004011750 and Minco Products Inc part number S230N110Y2. The item is designated as a critical application item and must be delivered FOB Destination to the USS NIMITZ CVN 68 at FPO AE 09523. The original required delivery date is October 22, 2026, with a delivery lead time of five days. The contract mandates strict adherence to quality and packaging standards, including ISO 9001:2015 for manufacturer inspection systems and sampling methods per MIL-STD-1916 or ASQ H1331. Packaging must comply with ASTM D3951 and RP001, with marking and labeling following MIL-STD-129. Technical and quality requirements are further governed by the DLA Master List, specifically referencing RQ001, RQ011, and RQ017. Additionally, the contract prohibits the intentional addition of mercury and requires compliance with the Buy American Act and various DFARS cybersecurity and safeguarding regulations. Invoicing and payment must be processed electronically through the Wide Area WorkFlow system.

DLA WEAPONS SUPPORT AVIATION SUPPLY CHAIN ESOC BUYS

POSTED

DEADLINE

More opportunities from Department Of Defense → Defense Logistics Agency

Same awarding agency

Supplier of Indicator Lights (NSN 6210000011430)

Service Establishment Equipment and Supplies Merchant Wholesalers

POSTED

about 9 hours ago

DEADLINE

Power Supply Unit Supplier (NSN 6130-01-524-9767)

Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers

POSTED

about 9 hours ago

DEADLINE

Lead-Acid Sealed Gel Electrolyte Storage Battery SupplyThis subcontract through the Defense Logistics Agency involves the supply of one lead-acid, sealed, gel electrolyte storage battery, identified by NSN 6140-01-310-7173. The contractor is responsible for ensuring the item is marked according to MIL-STD-129 and packaged in compliance with MIL-STD-2073-1E and RP001 standards. Delivery of the completed battery is required FOB Destination. The opportunity falls under NAICS code 335910 and is associated with the Department of Defense. The place of performance is located in North Little Rock, Arkansas. Interested parties must note the response deadline of November 9, 2026, following the posting date of October 29, 2026.

Battery Manufacturing

POSTED

about 9 hours ago

DEADLINE

Supply of Labels (NSN 7690-01-417-9227)This subcontract through the Defense Logistics Agency involves the manufacture or procurement of specialized labels under NSN 7690-01-417-9227 for prime contractors on Department of Defense supply contracts. The contractor is responsible for ensuring all labels meet specific technical requirements, including the application of Special Marking Code 32 for shelf life management. All items must be packaged and marked in strict accordance with MIL-STD-2073-1E and MIL-STD-129 standards. The contract falls under NAICS code 323111 and requires delivery via traceable shipping within 30 days after receipt of order. Performance will take place in the 28310 zip code area. Interested parties must respond by the deadline of November 5, 2026.

Commercial Printing (except Screen and Books)

POSTED

about 9 hours ago

DEADLINE

Supply of Parts Kit, Gun (NSN 1005-01-723-1183)This subcontract involves the procurement of one complete gun parts kit, specifically identified by NSN 1005-01-723-1183, to support prime contractors fulfilling Defense Logistics Agency supply contracts. The supplier must ensure the kit adheres to the DLA Master List of Technical and Quality Requirements (RA001) and follows MIL-STD-129 standards for all marking and shipment procedures. The contract requires strict adherence to cybersecurity protocols, specifically DFARS 252.204-7012 and NIST SP 800-171. Performance will take place at FPO 09523 under NAICS code 332994. The response deadline for this requirement is November 9, 2026.

Small Arms, Ordnance, and Ordnance Accessories Manufacturing

POSTED

about 9 hours ago

DEADLINE

Supply of Plastic Press StripsThis subcontract involves the manufacture or sourcing of 1,000 plastic press strips under NSN 9330-01-679-0943 for prime contractors supporting Defense Logistics Agency Troop Support contracts. The selected provider must hold a small business certification and ensure all items are produced in strict accordance with the DLA Master List of Technical and Quality Requirements. Performance will take place in Hattiesburg, Mississippi, with a final delivery deadline of March 30, 2026. The procurement falls under NAICS code 333310 and is managed through the Department of Defense.

Commercial and Service Industry Machinery Manufacturing

POSTED

about 9 hours ago

DEADLINE

Supply of Labels (NSN 7690-01-417-9227)This subcontract involves the manufacture or sourcing of specialized labels under NSN 7690-01-417-9227 to support prime contractors for the Defense Logistics Agency. The selected provider must ensure all products adhere to strict military standards, specifically performing packaging according to MIL-STD-2073-1E and RP001, and executing marking requirements per MIL-STD-129 and Special Marking Code 32. The scope of work requires the delivery of 2,000 rolls of labels to the bulk break point located at Fort Bragg, North Carolina. All deliverables must be completed and delivered within 30 days after the order is placed. This requirement falls under NAICS code 323111 and is managed through the Department of Defense.

Commercial Printing (except Screen and Books)

POSTED

about 9 hours ago

DEADLINE

Supply of Flashbreaker Tape #1This subcontract involves the supply of 10 rolls of Flashbreaker Tape #1, identified by NSN 8040LLNC19218 and Airtech International Inc Part Number FLASHBREAKER 1, to support prime contractors delivering for the Defense Logistics Agency. The materials must be delivered FOB Destination to Cherry Point, zip code 28533-0021. The contract requires strict adherence to ASTM D3951 and MIL-STD-129 standards for packaging and marking. Additionally, the provider must ensure full compliance with the Buy American Act and DFARS cybersecurity regulations. The solicitation was posted on October 29, 2026, with a response deadline of November 6, 2026, under NAICS code 339113.

Surgical Appliance and Supplies Manufacturing

POSTED

about 9 hours ago

DEADLINE

Air Conditioner Unit Supplier (NSN 4120-01-649-1002)This subcontract involves the procurement and delivery of air conditioner units matching NSN 4120-01-649-1002 to support prime contractors fulfilling Defense Logistics Agency supply contracts. The supplier is responsible for ensuring all units comply with specific packaging and marking requirements, as well as standards set by the Consumer Product Safety Act. Additionally, the provider must certify that no additive manufacturing processes were used in production and must supply Hazardous Material Identification and Material Safety Data Sheets where applicable. The contract is categorized under NAICS code 423440 and is managed through the Department of Defense. Performance of the contract takes place at FPO 96322-0001. Interested parties must adhere to the response deadline of November 3, 2026, to be considered for the delivery of these physical units.

Other Commercial Equipment Merchant Wholesalers

POSTED

about 9 hours ago

DEADLINE

Supply of NSN 4820013550268This subcontract involves the procurement of one unit of NSN 4820013550268 to support prime contractors under the Defense Logistics Agency. The selected provider is responsible for sourcing the specific part and ensuring all items are packaged according to ASTM D3951 standards. Additionally, all packaging must be marked and labeled in strict accordance with MIL-STD-129 and the DLA Master List of Technical and Quality Requirements. The contract is categorized under NAICS code 423830 and requires delivery of the unit FOB Destination to a performance location in FPO 96673. Interested parties must submit their responses by the deadline of November 9, 2026, for this Department of Defense requirement.

Industrial Machinery and Equipment Merchant Wholesalers

POSTED

about 9 hours ago

DEADLINE

Supplier of Identification Markers (NSN 7690014718188)This subcontract with the Defense Logistics Agency involves the manufacture or sourcing of specialized identification markers, specifically NSN 7690014718188 and General Dynamics Land Systems part LSCP740025. The selected supplier is responsible for delivering two units to the Anniston Army Depot, ensuring all items are marked and packaged in strict accordance with MIL-STD-129 and MIL-STD-2073-1E standards. Key requirements include full compliance with the Buy American Act and the guarantee of a non-extendable shelf life of 12 months. The contract falls under NAICS code 339999 and requires adherence to specific military specifications to support prime contractors on DLA supply contracts.

All Other Miscellaneous Manufacturing

POSTED

about 9 hours ago

DEADLINE

Supply of Fluid Cooler Core Assembly (Cummins P/N 4933306)This subcontract involves the supply of one Fluid Cooler Core Assembly, specifically Cummins Inc. part number 4933306, for prime contractors supporting Defense Logistics Agency contracts. The item is designated as a Critical Application Item, requiring formal certification of authenticity to ensure operational safety and reliability. The contractor is responsible for adhering to strict military standards, including marking requirements per MIL-STD-129 and packaging specifications per MIL-STD-2073-1E. Performance for this requirement is centered in San Diego, California, with the final deliverable being one properly marked and packaged core assembly.

Printed Circuit Assembly (Electronic Assembly) Manufacturing

POSTED

about 9 hours ago

DEADLINE

Earlier notices in this NAICS code

Posted before this notice, open and closed

Supply of Dial Pressure Gages (Commercial Off-the-Shelf Item)

LAND SUPPLIER OPNS ENGINES

POSTED

CLOSED

ALARM, SMOKE, AUTOMAT

Solicitation # SPE4A6-26-T-00YD

Defense Logistics Agency

POSTED

CLOSED

THERMOSTAT, OVERHEAT

Solicitation # SPE4A626F4207

Defense Logistics Agency

POSTED

DEADLINE

SWITCH, THERMOSTATIC

Solicitation # SPE7M8-26-T-4880

Defense Logistics Agency

POSTED

DEADLINE

THERMOSTAT, FLOW CON

Solicitation # SPE4A5-26-T-194D

Defense Logistics Agency

POSTED

DEADLINE

THERMOSTAT, FLOW CON

Solicitation # SPE4A0-26-T-1759

Defense Logistics Agency

POSTED

DEADLINE

66--TRANSMITTER,PRESSUR

Solicitation # SPE4A526T207G

POSTED

DEADLINE

Supply of Lightweight Vehicle-Mounted Drone Detectors

0409 Aq Hq Contract

POSTED

CLOSED

Precision Measurement Instrument Supply – Dial Indicating Differential Gage

ASC COMMODITIES DIVISION

POSTED

CLOSED

SWITCH, THERMOSTATIC

Solicitation # SPE7M8-26-T-4771

Defense Logistics Agency

POSTED

DEADLINE

SWITCH, THERMOSTATIC

Solicitation # SPE7M8-26-T-4766

Defense Logistics Agency

POSTED

DEADLINE

59--SWITCH,THERMOSTATIC

Solicitation # SPE7M8-26-T-4380

Defense Logistics Agency

POSTED

DEADLINE

Ready to Pursue This Opportunity?

Get AI-powered intelligence on this solicitation and the ones like it

Every page of the solicitation package shredded into a compliance breakdown

AI-powered matching based on your capabilities and past performance

Competitor and incumbent history on the requirement

Automated alerts on amendments, Q&A deadlines, and award

Join 750+ contractors already using CLEATUS