PartsTable
Technical Data Sheet

25921-1/04 — BUMPER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

25921-1/04: BUMPER.

The BUMPER is a the manufacturer industrial component. Key specifications include material: RUBBER, overall_width: 60.0 MILLIMETERS NOMINAL MM, overall_height: 64.0 MILLIMETERS NOMINAL MM, overall_length: 120.0 MILLIMETERS NOMINAL MM, end_item_identification: HIGH-MOBILITY ARTILLERY ROCKET SYSTEM (HIMARS), material_document_and_classification: ASTM D2000, GRADE -3BC714A14B14C12E034F17K11Z1Z2Z3 ASSN STD SINGLE MATERIAL RESPONSE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-432-9161, 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
25921-1/04
NSN: 5340-01-432-9161
FSC: 5340 — Hardware, Commercial
CAGE: 81860 — HUTCHINSON AEROSPACE & INDUSTRY, INC. DBA BARRY WRIGHT CORP (USA)
SPECIFICATIONS
materialRUBBER
overall_width60.0 MILLIMETERS NOMINAL MM
overall_height64.0 MILLIMETERS NOMINAL MM
overall_length120.0 MILLIMETERS NOMINAL MM
end_item_identificationHIGH-MOBILITY ARTILLERY ROCKET SYSTEM (HIMARS)
material_document_and_classificationASTM D2000, GRADE -3BC714A14B14C12E034F17K11Z1Z2Z3 ASSN STD SINGLE MATERIAL RESPONSE
NSN5340-01-432-9161
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 25921-1/04 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM D2000, GRADE -3BC714A14B14C12E034F17K11Z1Z2Z3 ASSN STD SINGLE MATERIAL RESPONSE
•
MATERIAL: RUBBER
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT64.0 MILLIMETERS NOMINAL MM
MATERIAL DOCUMENT AND CLASSIFICATIONASTM D2000, GRADE -3BC714A14B14C12E034F17K11Z1Z2Z3 ASSN STD SINGLE MATERIAL RESPONSE
OVERALL LENGTH120.0 MILLIMETERS NOMINAL MM
OVERALL WIDTH60.0 MILLIMETERS NOMINAL MM
END ITEM IDENTIFICATIONHIGH-MOBILITY ARTILLERY ROCKET SYSTEM (HIMARS)
MATERIALRUBBER
SUBSTITUTES & CROSS-REFERENCES 1
12417633Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 25921-1/04?
25921-1/04 is a BUMPER.
What parts can replace 25921-1/04?
There is 1 known substitute for 25921-1/04: 12417633. Substitute compatibility should be verified for your specific system.
What is the NSN for 25921-1/04?
25921-1/04 is cataloged in the U.S. Government catalog under NSN 5340-01-432-9161. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.