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Technical Data Sheet
PartsTable / COMPONENT / SM-B-157108
SM-B-157108 ✓ 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 STANDOFF,THREADED,SPACING is a the manufacturer industrial component. Key specifications include length: 2.750 INCHES NOMINAL IN, diameter: 0.250 INCHES NOMINAL IN, material: STEEL OVERALL, surface_treatment: ANODIZE OVERALL, cross-sectional_shape: RECTANGULAR, distance_from_centerline_to_flat: 0.437 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-392-7761, 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-157108
NSN: 5340-00-392-7761
FSC: 5340
CAGE: 74954 — JAY BEE MACHINE WORKS, INC (USA)
SPECIFICATIONS
length2.750 INCHES NOMINAL IN
diameter0.250 INCHES NOMINAL IN
materialSTEEL OVERALL
surface_treatmentANODIZE OVERALL
cross-sectional_shapeRECTANGULAR
distance_from_centerline_to_flat0.437 INCHES NOMINAL IN
NSN5340-00-392-7761
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SM-B-157108 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 OVERALL
•
LENGTH: 2.750 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE: RECTANGULAR
•
DIAMETER: 0.250 INCHES NOMINAL IN
•
SURFACE TREATMENT: ANODIZE OVERALL
•
DISTANCE FROM CENTERLINE TO FLAT: 0.437 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
LENGTH2.750 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPERECTANGULAR
DIAMETER0.250 INCHES NOMINAL IN
SURFACE TREATMENTANODIZE OVERALL
DISTANCE FROM CENTERLINE TO FLAT0.437 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
10-311-6Interchangeable
interchangeable cross-reference
interchangeable
3505FInterchangeable
interchangeable cross-reference
interchangeable
2D6-29F-1Interchangeable
interchangeable cross-reference
interchangeable
D600K232Interchangeable
interchangeable cross-reference
interchangeable
851208Interchangeable
interchangeable cross-reference
interchangeable
V1NC2019Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SM-B-157108?
SM-B-157108 is a STANDOFF,THREADED,SPACING.
What parts can replace SM-B-157108?
There are 18 known substitutes for SM-B-157108: 10-311-6, 3505F, 2D6-29F-1 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SM-B-157108?
SM-B-157108 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-392-7761. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026