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Technical Data Sheet
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2921253 — BRACKET,MOUNTING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

2921253: BRACKET,MOUNTING.

The BRACKET,MOUNTING is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5340-01-309-4974, 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
2921253
NSN: 5340-01-309-4974
FSC: 5340 — Hardware, Commercial
CAGE: 56232 — LOCKHEED MARTIN CORPORATION DIV RMS - MITCHEL FIELD (USA)
SPECIFICATIONS
Part Number2921253
NSN5340-01-309-4974
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2921253 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
SPECIAL FEATURESALUMINUM ALLOY,QQ-A-250/8,ALLOY 5052-H32; CHROMATE,MIL-C-5541,CLASS 1; 2.375 IN. LG; 0.750 IN. WIDE; 0.172 IN. H; 2 MOUNTING SLOTS 0.375 IN LG BY 0.164 IN. MIN AND 0.174 IN. MAX WIDE; MOUNTING HOLE FOR INSERT 0.406 IN. MIN AND 0.409 IN. MAX DIA; INSERT SCREW THREAD INCLUDED P/N 2922500 CAGEC 10001 IN
SUBSTITUTES & CROSS-REFERENCES 1
780539Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2921253?
2921253 is a BRACKET,MOUNTING.
What parts can replace 2921253?
There is 1 known substitute for 2921253: 780539. Substitute compatibility should be verified for your specific system.
What is the NSN for 2921253?
2921253 is cataloged in the U.S. Government catalog under NSN 5340-01-309-4974. This indicates validated use in U.S. government and defense supply chains.
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