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S381-6 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The CLAMP,LOOP is a the manufacturer industrial component. Key specifications include end_item_identification: MAJOR ASSEMBLY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-056-9349, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
S381-6
NSN: 5340-01-056-9349
FSC: 5340
CAGE: 18076 — UMPCO, INC. DBA UMPCO INC (USA)
SPECIFICATIONS
end_item_identificationMAJOR ASSEMBLY
NSN5340-01-056-9349
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: S381-6 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONMAJOR ASSEMBLY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
3856Upgraded Successor
successor cross-reference
successor
8681888Interchangeable
interchangeable cross-reference
interchangeable
3856L1Interchangeable
interchangeable cross-reference
interchangeable
3856-4INInterchangeable
interchangeable cross-reference
interchangeable
3926Interchangeable
interchangeable cross-reference
interchangeable
R1983CInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S381-6?
S381-6 is a CLAMP,LOOP.
What parts can replace S381-6?
There are 16 known substitutes for S381-6: 3856, 8681888, 3856L1 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S381-6?
S381-6 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-056-9349. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026