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Technical Data Sheet
PartsTable / COMPONENT / M85049/138-20C
M85049/138-20C ✓ 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 M85049/138-20C is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-426-1656, 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
M85049/138-20C
NSN: 5340-01-426-1656
FSC: 5340
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
Part NumberM85049/138-20C
NSN5340-01-426-1656
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M85049/138-20C 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
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 0.6550 INCHES MINIMUM AND 0.6750 INCHES MAXIMUM IN
•
ROUND CAP OUTSIDE SURFACE CONDITION: SMOOTH
•
INSIDE DIAMETER LENGTH: 0.4690 INCHES MINIMUM AND 0.5310 INCHES MAXIMUM IN
•
MATERIAL: PLASTIC
•
DESIGN TYPE: FRICTION
•
OVERALL DIAMETER: 0.8090 INCHES MINIMUM AND 0.8710 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.6550 INCHES MINIMUM AND 0.6750 INCHES MAXIMUM IN
ROUND CAP OUTSIDE SURFACE CONDITIONSMOOTH
INSIDE DIAMETER LENGTH0.4690 INCHES MINIMUM AND 0.5310 INCHES MAXIMUM IN
MATERIALPLASTIC
DESIGN TYPEFRICTION
SPECIAL FEATURESTHE ITEM IS MADE OUT OF MIL-B-81705,TYPE 1
OVERALL DIAMETER0.8090 INCHES MINIMUM AND 0.8710 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
6971-0014Upgraded Successor
successor cross-reference
successor
MS90376-12RBUpgraded Successor
successor cross-reference
successor
M85049/138-24CUpgraded Successor
successor cross-reference
successor
6972-0012Upgraded Successor
successor cross-reference
successor
M85049/138-22CUpgraded Successor
successor cross-reference
successor
M85049/138-20CUpgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M85049/138-20C?
M85049/138-20C is a M85049/138-20C.
What parts can replace M85049/138-20C?
There are 11 known substitutes for M85049/138-20C: 6971-0014, MS90376-12RB, M85049/138-24C and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M85049/138-20C?
M85049/138-20C is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-426-1656. 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