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Technical Data Sheet
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A1998PC9 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

A1998PC9: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, cross-sectional_height: 0.188 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-171-8069, 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
A1998PC9
NSN: 5331-00-171-8069
FSC: 5331 — O-ring
CAGE: 71871 — ALFA LAVAL INC (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
cross-sectional_height0.188 INCHES NOMINAL IN
NSN5331-00-171-8069
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A1998PC9 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: 0.188 INCHES NOMINAL IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.188 INCHES NOMINAL IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
SUBSTITUTES & CROSS-REFERENCES 3
18586Reference document
Same NSN cross-reference
Reference document — Secondary reference
18586DReference document
Same NSN cross-reference
Reference document — Secondary reference
5331PL0659205Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A1998PC9?
A1998PC9 is a O-RING.
What parts can replace A1998PC9?
There are 3 known substitutes for A1998PC9: 18586, 18586D, 5331PL0659205. Substitute compatibility should be verified for your specific system.
What is the NSN for A1998PC9?
A1998PC9 is cataloged in the U.S. Government catalog under NSN 5331-00-171-8069. This indicates validated use in U.S. government and defense supply chains.
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