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Technical Data Sheet
PartsTable / COMPONENT / SM-B-187391
SM-B-187391 ✓ 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 COVER,ACCESS is a the manufacturer industrial component. Key specifications include material: STEEL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-658-0612, 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
SM-B-187391
NSN: 5340-00-658-0612
FSC: 5340
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
materialSTEEL
NSN5340-00-658-0612
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SM-B-187391 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
KEY FEATURES
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
11644Interchangeable
interchangeable cross-reference
interchangeable
NEW PRODUCTInterchangeable
interchangeable cross-reference
interchangeable
3000 BLACK IDInterchangeable
interchangeable cross-reference
interchangeable
12448736-1Interchangeable
interchangeable cross-reference
interchangeable
RCSK 16887Interchangeable
interchangeable cross-reference
interchangeable
RCSK16887-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SM-B-187391?
SM-B-187391 is a COVER,ACCESS.
What parts can replace SM-B-187391?
There are 10 known substitutes for SM-B-187391: 11644, NEW PRODUCT, 3000 BLACK ID and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SM-B-187391?
SM-B-187391 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-658-0612. 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