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UJ312 ✓ 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 SEAL,PLAIN is a the manufacturer industrial component. Key specifications include part_name_assigned_by_controlling_agency: CUP SEAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-642-9877, 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
UJ312
NSN: 5330-01-642-9877
FSC: 5330
CAGE: 80201 — SKF USA INC. DBA SKF AEROSPACE SEALING SOLUTIONS (USA)
SPECIFICATIONS
part_name_assigned_by_controlling_agencyCUP SEAL
NSN5330-01-642-9877
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: UJ312 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
TECHNICAL CHARACTERISTICS (FLIS)
PART NAME ASSIGNED BY CONTROLLING AGENCYCUP SEAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
21206Interchangeable
interchangeable cross-reference
interchangeable
102615Interchangeable
interchangeable cross-reference
interchangeable
NCA4676AInterchangeable
interchangeable cross-reference
interchangeable
250116Interchangeable
interchangeable cross-reference
interchangeable
9995590Interchangeable
interchangeable cross-reference
interchangeable
SA21206Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is UJ312?
UJ312 is a SEAL,PLAIN.
What parts can replace UJ312?
There are 14 known substitutes for UJ312: 21206, 102615, NCA4676A and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for UJ312?
UJ312 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-642-9877. 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