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338B1 — BUMPER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

338B1: BUMPER.

The BUMPER is a the manufacturer industrial component. Key specifications include material: RUBBER, overall_height: 0.625 INCHES NOMINAL IN, groove_diameter: 0.250 INCHES NOMINAL IN, style_designator: DOUBLE FLANGE, top_flange_width: 0.250 INCHES NOMINAL IN, bottom_flange_width: 0.125 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-753-9201, 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
338B1
NSN: 5340-00-753-9201
FSC: 5340 — Hardware, Commercial
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialRUBBER
overall_height0.625 INCHES NOMINAL IN
groove_diameter0.250 INCHES NOMINAL IN
style_designatorDOUBLE FLANGE
top_flange_width0.250 INCHES NOMINAL IN
bottom_flange_width0.125 INCHES NOMINAL IN
bottom_flange_diameter0.594 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN
end_item_identificationW/S:TRUCK, M-915 SERIES, M-916A1 (LET); TRUCK, CARGO, DROPSIDE 2 1/2-TON 6X6 W/E
outside/top_flange_diameter0.625 INCHES NOMINAL IN
material_document_and_classificationMIL-R-3065, SC515CFPG MIL SPEC SINGLE MATERIAL RESPONSE
NSN5340-00-753-9201
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 338B1 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
•
BOTTOM FLANGE DIAMETER: 0.594 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN
•
OUTSIDE/TOP FLANGE DIAMETER: 0.625 INCHES NOMINAL IN
•
GROOVE DIAMETER: 0.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: DOUBLE FLANGE
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-3065, SC515CFPG MIL SPEC SINGLE MATERIAL RESPONSE
•
BOTTOM FLANGE WIDTH: 0.125 INCHES NOMINAL IN
•
TOP FLANGE WIDTH: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
BOTTOM FLANGE DIAMETER0.594 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN
OVERALL HEIGHT0.625 INCHES NOMINAL IN
OUTSIDE/TOP FLANGE DIAMETER0.625 INCHES NOMINAL IN
GROOVE DIAMETER0.250 INCHES NOMINAL IN
STYLE DESIGNATORDOUBLE FLANGE
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-3065, SC515CFPG MIL SPEC SINGLE MATERIAL RESPONSE
BOTTOM FLANGE WIDTH0.125 INCHES NOMINAL IN
TOP FLANGE WIDTH0.250 INCHES NOMINAL IN
END ITEM IDENTIFICATIONW/S:TRUCK, M-915 SERIES, M-916A1 (LET); TRUCK, CARGO, DROPSIDE 2 1/2-TON 6X6 W/E
MATERIALRUBBER
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
5340007539201Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 338B1?
338B1 is a BUMPER.
What parts can replace 338B1?
There is 1 known substitute for 338B1: 5340007539201. Substitute compatibility should be verified for your specific system.
What is the NSN for 338B1?
338B1 is cataloged in the U.S. Government catalog under NSN 5340-00-753-9201. 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.