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155509 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

155509: O-RING.

The O-RING is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5331-00-727-1882, 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
155509
NSN: 5331-00-727-1882
FSC: 5331 — O-ring
CAGE: 98343 — MIDLAND BRAKE INC DIV OF ECHLIN INC (USA)
SPECIFICATIONS
Part Number155509
NSN5331-00-727-1882
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 155509 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
SUBSTITUTES & CROSS-REFERENCES 9
AV51-932PC7Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
SP100-103Reference document
Same NSN cross-reference
Reference document — Secondary reference
15152 N PIECE 56Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
200-027-4470Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
A6689.027.144Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
ARP568-027MILP5 516CLBReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 155509?
155509 is a O-RING.
What parts can replace 155509?
There are 9 known substitutes for 155509: AV51-932PC7, SP100-103, 15152 N PIECE 56 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 155509?
155509 is cataloged in the U.S. Government catalog under NSN 5331-00-727-1882. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.