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Technical Data Sheet
PartsTable / O-RING / A139101
A139101 ✓ 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 BUTADIENE-ACRYLONITRILE CLASS NBR, center_hole_diameter: 0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN, cross-sectional_height: 0.053 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-958-9731, 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
A139101
NSN: 5331-00-958-9731
FSC: 5331 — O-RING
CAGE: 8Z296 — DANFOSS FLUID POWER INC EASLEY OPN (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
center_hole_diameter0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
cross-sectional_height0.053 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN
NSN5331-00-958-9731
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A139101 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: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
CROSS-SECTIONAL HEIGHT: 0.053 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CROSS-SECTIONAL HEIGHT0.053 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN
CENTER HOLE DIAMETER0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
19791Interchangeable
interchangeable cross-reference
interchangeable
54A50A8Interchangeable
interchangeable cross-reference
interchangeable
A1911PC107Interchangeable
interchangeable cross-reference
interchangeable
A2133PC107Interchangeable
interchangeable cross-reference
interchangeable
A1353MPC107Interchangeable
interchangeable cross-reference
interchangeable
A7859Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A139101?
A139101 is a O-RING.
What parts can replace A139101?
There are 12 known substitutes for A139101: 19791, 54A50A8, A1911PC107 and 9 more. Substitute compatibility should be verified for your specific system.
Is A139101 still available?
A139101 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026