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M90440 — BUMPER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

M90440: BUMPER.

The BUMPER is a the manufacturer industrial component. Key specifications include material: RUBBER, overall_width: 0.375 INCHES NOMINAL IN, part_name_assigned_by_controlling_agency: RUBBER, BUMPER. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-696-5731, 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
M90440
NSN: 5340-01-696-5731
FSC: 5340 — Hardware, Commercial
CAGE: 1BL81 — SPECTRO SCIENTIFIC, INC DBA SPECTRO INC (USA)
SPECIFICATIONS
materialRUBBER
overall_width0.375 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyRUBBER, BUMPER
NSN5340-01-696-5731
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M90440 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: RUBBER
TECHNICAL CHARACTERISTICS
OVERALL WIDTH0.375 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYRUBBER, BUMPER
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 2
4245AS0102Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
4245AS0102-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 M90440?
M90440 is a BUMPER.
What parts can replace M90440?
There are 2 known substitutes for M90440: 4245AS0102, 4245AS0102-1. Substitute compatibility should be verified for your specific system.
What is the NSN for M90440?
M90440 is cataloged in the U.S. Government catalog under NSN 5340-01-696-5731. 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.