PartsTable
Technical Data Sheet
999F0444 PIECE 42 ✓ 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 product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-298-8058, 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
999F0444 PIECE 42
NSN: 5331-01-298-8058
FSC: 5331 — O-RING
CAGE: 63857 — CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS (USA)
SPECIFICATIONS
Part Number999F0444 PIECE 42
NSN5331-01-298-8058
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 999F0444 PIECE 42 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 5
478621C1Interchangeable
interchangeable cross-reference
interchangeable
P270Interchangeable
interchangeable cross-reference
interchangeable
C1650PLInterchangeable
interchangeable cross-reference
interchangeable
1961PXInterchangeable
interchangeable cross-reference
interchangeable
1396PInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 999F0444 PIECE 42?
999F0444 PIECE 42 is a O-RING.
What parts can replace 999F0444 PIECE 42?
There are 5 known substitutes for 999F0444 PIECE 42: 478621C1, P270, C1650PL and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 999F0444 PIECE 42?
999F0444 PIECE 42 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-298-8058. This indicates validated use in U.S. government and defense supply chains.
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