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Technical Data Sheet
PartsTable / O-RING / K73A0012-12
K73A0012-12 ✓ 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 CHLOROPRENE CLASS CR, center_hole_diameter: 4.470 INCHES MINIMUM AND 4.530 INCHES MAXIMUM IN, cross-sectional_height: 0.057 INCHES MINIMUM AND 0.063 INCHES MAXIMUM 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 5331-01-205-5030, 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
K73A0012-12
NSN: 5331-01-205-5030
FSC: 5331 — O-RING
CAGE: 12464 — MCDONNELL DOUGLAS CORP MCDONNELL DOUGLAS ELECTRONIC SYSTEMS CO (USA)
SPECIFICATIONS
materialRUBBER CHLOROPRENE CLASS CR
center_hole_diameter4.470 INCHES MINIMUM AND 4.530 INCHES MAXIMUM IN
cross-sectional_height0.057 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
NSN5331-01-205-5030
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: K73A0012-12 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: 0.057 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 4.470 INCHES MINIMUM AND 4.530 INCHES MAXIMUM IN
•
MATERIAL: RUBBER CHLOROPRENE CLASS CR
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.057 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
CENTER HOLE DIAMETER4.470 INCHES MINIMUM AND 4.530 INCHES MAXIMUM IN
MATERIALRUBBER CHLOROPRENE CLASS CR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
905126-1Interchangeable
interchangeable cross-reference
interchangeable
905126-001Interchangeable
interchangeable cross-reference
interchangeable
40482Interchangeable
interchangeable cross-reference
interchangeable
ND7Interchangeable
interchangeable cross-reference
interchangeable
12636-C128Interchangeable
interchangeable cross-reference
interchangeable
717-021414Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is K73A0012-12?
K73A0012-12 is a O-RING.
What parts can replace K73A0012-12?
There are 11 known substitutes for K73A0012-12: 905126-1, 905126-001, 40482 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for K73A0012-12?
K73A0012-12 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-205-5030. 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