PartsTable
Technical Data Sheet
PartsTable / O-RING / B-631-12505-3
B-631-12505-3 ✓ 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, temp_rating: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF, hardness_rating: 75.0 SHORE DUROMETER A NOMINAL, outside_diameter: 1.387 INCHES NOMINAL IN, center_hole_diameter: 1.097 INCHES MINIMUM AND 1.121 INCHES MAXIMUM IN, elongation_percentage: 125 MAXIMUM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-128-4873, 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
B-631-12505-3
NSN: 5331-01-128-4873
FSC: 5331 — O-RING
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialRUBBER SYNTHETIC
temp_rating-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
hardness_rating75.0 SHORE DUROMETER A NOMINAL
outside_diameter1.387 INCHES NOMINAL IN
center_hole_diameter1.097 INCHES MINIMUM AND 1.121 INCHES MAXIMUM IN
elongation_percentage125 MAXIMUM
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
NSN5331-01-128-4873
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: B-631-12505-3 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
•
TEMP RATING: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
•
MATERIAL: RUBBER SYNTHETIC
•
HARDNESS RATING: 75.0 SHORE DUROMETER A NOMINAL
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
ELONGATION PERCENTAGE: 125 MAXIMUM
•
CENTER HOLE DIAMETER: 1.097 INCHES MINIMUM AND 1.121 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 1.387 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
TEMP RATING-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
MATERIALRUBBER SYNTHETIC
HARDNESS RATING75.0 SHORE DUROMETER A NOMINAL
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
ELONGATION PERCENTAGE125 MAXIMUM
CENTER HOLE DIAMETER1.097 INCHES MINIMUM AND 1.121 INCHES MAXIMUM IN
OUTSIDE DIAMETER1.387 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
70-12-113Interchangeable
interchangeable cross-reference
interchangeable
A-82320 PC 5Interchangeable
interchangeable cross-reference
interchangeable
2-216N674-70Interchangeable
interchangeable cross-reference
interchangeable
845-2181262PC13,SIZE0.25Interchangeable
interchangeable cross-reference
interchangeable
M83461/1-216Interchangeable
interchangeable cross-reference
interchangeable
C-8220ITEM11Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B-631-12505-3?
B-631-12505-3 is a O-RING.
What parts can replace B-631-12505-3?
There are 12 known substitutes for B-631-12505-3: 70-12-113, A-82320 PC 5, 2-216N674-70 and 9 more. Substitute compatibility should be verified for your specific system.
Is B-631-12505-3 still available?
B-631-12505-3 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