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4185858 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

4185858: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include overall_length: 0.62 INCHES NOMINAL IN, end_item_identification: MRAP M-ATV UI, part_name_assigned_by_controlling_agency: CAP,PROTECTIVE,TURBO AIR LINE, opening_inside_diameter_for_which_designed: 0.44 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-633-2329, 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
4185858
NSN: 5340-01-633-2329
FSC: 5340 — Hardware, Commercial
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
overall_length0.62 INCHES NOMINAL IN
end_item_identificationMRAP M-ATV UI
part_name_assigned_by_controlling_agencyCAP,PROTECTIVE,TURBO AIR LINE
opening_inside_diameter_for_which_designed0.44 INCHES NOMINAL IN
NSN5340-01-633-2329
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4185858 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
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 0.44 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL LENGTH0.62 INCHES NOMINAL IN
OPENING INSIDE DIAMETER FOR WHICH DESIGNED0.44 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYCAP,PROTECTIVE,TURBO AIR LINE
END ITEM IDENTIFICATIONMRAP M-ATV UI
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4185858?
4185858 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What is the NSN for 4185858?
4185858 is cataloged in the U.S. Government catalog under NSN 5340-01-633-2329. 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.