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Technical Data Sheet
PartsTable / O-RING / 7HB502
7HB502 ✓ 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, center_hole_diameter: 2.750 INCHES NOMINAL IN, cross-sectional_height: 0.125 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 5331-01-444-3079, 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
7HB502
NSN: 5331-01-444-3079
FSC: 5331 — O-RING
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialRUBBER
center_hole_diameter2.750 INCHES NOMINAL IN
cross-sectional_height0.125 INCHES NOMINAL IN
NSN5331-01-444-3079
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 7HB502 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: 0.125 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 2.750 INCHES NOMINAL IN
•
MATERIAL: RUBBER
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.125 INCHES NOMINAL IN
CENTER HOLE DIAMETER2.750 INCHES NOMINAL IN
MATERIALRUBBER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
262893Interchangeable
interchangeable cross-reference
interchangeable
625580Interchangeable
interchangeable cross-reference
interchangeable
9880Interchangeable
interchangeable cross-reference
interchangeable
0BTAINInterchangeable
interchangeable cross-reference
interchangeable
D19Interchangeable
interchangeable cross-reference
interchangeable
18786AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7HB502?
7HB502 is a O-RING.
What parts can replace 7HB502?
There are 9 known substitutes for 7HB502: 262893, 625580, 9880 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 7HB502?
7HB502 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-444-3079. 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