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Technical Data Sheet
PartsTable / O-RING / 91638540
91638540 ✓ 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 O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC, cross-sectional_height: 0.070 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 5331-00-441-3105, 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
91638540
NSN: 5331-00-441-3105
FSC: 5331 — O-RING
CAGE: F6481 — THALES SA (FRA)
SPECIFICATIONS
materialRUBBER SYNTHETIC
cross-sectional_height0.070 INCHES NOMINAL IN
NSN5331-00-441-3105
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 91638540 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
•
CROSS-SECTIONAL HEIGHT: 0.070 INCHES NOMINAL IN
•
MATERIAL: RUBBER SYNTHETIC
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.070 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
173792Interchangeable
interchangeable cross-reference
interchangeable
DM15F751J0100WV1CRInterchangeable
interchangeable cross-reference
interchangeable
14X1,78-24B7Interchangeable
interchangeable cross-reference
interchangeable
2-015 N304-75Interchangeable
interchangeable cross-reference
interchangeable
2272-015Interchangeable
interchangeable cross-reference
interchangeable
20729006 REV L FN 9Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 91638540?
91638540 is a O-RING.
What parts can replace 91638540?
There are 7 known substitutes for 91638540: 173792, DM15F751J0100WV1CR, 14X1,78-24B7 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 91638540?
91638540 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-441-3105. 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