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3946458S — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

3946458S: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: PLASTIC, design_type: FRICTION, special_features: 3.750 DIAMETER, end_item_identification: 3990-01-444-5196 CONCRETE MIXER, part_name_assigned_by_controlling_agency: PLASTIC WEATHER CAP. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-551-5686, 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
3946458S
NSN: 5340-01-551-5686
FSC: 5340 — Hardware, Commercial
CAGE: 33457 — CUMMINS FILTRATION INC DBA FLEETGUARD DIV CUMMINS INC (USA)
SPECIFICATIONS
materialPLASTIC
design_typeFRICTION
special_features3.750 DIAMETER
end_item_identification3990-01-444-5196 CONCRETE MIXER
part_name_assigned_by_controlling_agencyPLASTIC WEATHER CAP
NSN5340-01-551-5686
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3946458S 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
•
DESIGN TYPE: FRICTION
•
MATERIAL: PLASTIC
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
SPECIAL FEATURES3.750 DIAMETER
PART NAME ASSIGNED BY CONTROLLING AGENCYPLASTIC WEATHER CAP
END ITEM IDENTIFICATION3990-01-444-5196 CONCRETE MIXER
MATERIALPLASTIC
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
6KP3Same 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 3946458S?
3946458S is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace 3946458S?
There is 1 known substitute for 3946458S: 6KP3. Substitute compatibility should be verified for your specific system.
What is the NSN for 3946458S?
3946458S is cataloged in the U.S. Government catalog under NSN 5340-01-551-5686. 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.