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4403K133 — BUMPER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

4403K133: BUMPER.

The BUMPER is a the manufacturer industrial component. Key specifications include material: RUBBER SILICONE, hole_depth: 0.25 INCHES NOMINAL IN, shank_length: 0.50 INCHES NOMINAL IN, overall_width: 1.00 INCHES NOMINAL IN, overall_height: 0.75 INCHES NOMINAL IN, overall_length: 1.25 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-612-6629, 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
4403K133
NSN: 5340-01-612-6629
FSC: 5340 — Hardware, Commercial
CAGE: 0KVE6 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialRUBBER SILICONE
hole_depth0.25 INCHES NOMINAL IN
shank_length0.50 INCHES NOMINAL IN
overall_width1.00 INCHES NOMINAL IN
overall_height0.75 INCHES NOMINAL IN
overall_length1.25 INCHES NOMINAL IN
special_featuresMOUNT, DAMPENER, 1/4-20, MALE STUD, FEMALE INSERT
style_designatorFLAT RECESSED TOP THREADED STUD
end_item_identificationMRAP BUFFALO MK2A2
NSN5340-01-612-6629
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4403K133 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
•
HOLE DEPTH: 0.25 INCHES NOMINAL IN
•
SHANK LENGTH: 0.50 INCHES NOMINAL IN
•
STYLE DESIGNATOR: FLAT RECESSED TOP THREADED STUD
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.75 INCHES NOMINAL IN
HOLE DEPTH0.25 INCHES NOMINAL IN
SHANK LENGTH0.50 INCHES NOMINAL IN
STYLE DESIGNATORFLAT RECESSED TOP THREADED STUD
OVERALL LENGTH1.25 INCHES NOMINAL IN
OVERALL WIDTH1.00 INCHES NOMINAL IN
SPECIAL FEATURESMOUNT, DAMPENER, 1/4-20, MALE STUD, FEMALE INSERT
END ITEM IDENTIFICATIONMRAP BUFFALO MK2A2
MATERIALRUBBER SILICONE
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

No substitute or cross-reference records for this part.

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 4403K133?
4403K133 is a BUMPER.
What is the NSN for 4403K133?
4403K133 is cataloged in the U.S. Government catalog under NSN 5340-01-612-6629. 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.