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12278755 ✓ 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 LOCK,RIM is a the manufacturer industrial component. Key specifications include thickness: 0.500 INCHES MINIMUM MEMBER IN, design_type: LATCH, special_features: KEY CHANGE QTY:0;MASTER KEY PROV:NOT INCLUDED;, locking_mechanism_type: TURN HANDLE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-179-1262, 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
12278755
NSN: 5340-01-179-1262
FSC: 5340
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
thickness0.500 INCHES MINIMUM MEMBER IN
design_typeLATCH
special_featuresKEY CHANGE QTY:0;MASTER KEY PROV:NOT INCLUDED;
locking_mechanism_typeTURN HANDLE
NSN5340-01-179-1262
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12278755 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
•
DESIGN TYPE: LATCH
•
THICKNESS: 0.500 INCHES MINIMUM MEMBER IN
•
LOCKING MECHANISM TYPE: TURN HANDLE
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESKEY CHANGE QTY:0;MASTER KEY PROV:NOT INCLUDED;
DESIGN TYPELATCH
THICKNESS0.500 INCHES MINIMUM MEMBER IN
LOCKING MECHANISM TYPETURN HANDLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
8880-387256199Interchangeable
interchangeable cross-reference
interchangeable
SK777Interchangeable
interchangeable cross-reference
interchangeable
52CInterchangeable
interchangeable cross-reference
interchangeable
1063Interchangeable
interchangeable cross-reference
interchangeable
1390Interchangeable
interchangeable cross-reference
interchangeable
1560AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12278755?
12278755 is a LOCK,RIM.
What parts can replace 12278755?
There are 6 known substitutes for 12278755: 8880-387256199, SK777, 52C and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 12278755?
12278755 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-179-1262. 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