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Technical Data Sheet
PartsTable / O-RING / A00542
A00542 ✓ 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. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-579-6495, 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
A00542
NSN: 5331-00-579-6495
FSC: 5331 — O-RING
CAGE: F8357 — UNAC (FRA)
SPECIFICATIONS
Part NumberA00542
NSN5331-00-579-6495
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A00542 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
CI-0012Interchangeable
interchangeable cross-reference
interchangeable
P49708-12Interchangeable
interchangeable cross-reference
interchangeable
AS568-012Interchangeable
interchangeable cross-reference
interchangeable
P49708-012Interchangeable
interchangeable cross-reference
interchangeable
P49708-0012Interchangeable
interchangeable cross-reference
interchangeable
28-7140Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A00542?
A00542 is a O-RING.
What parts can replace A00542?
There are 24 known substitutes for A00542: CI-0012, P49708-12, AS568-012 and 21 more. Substitute compatibility should be verified for your specific system.
Is A00542 still available?
A00542 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