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4-25EA — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

4-25EA: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: PLASTIC POLYVINYL CHLORIDE (PVC), design_type: FRICTION, round_cap_outside_surface_condition: SMOOTH, tube_outside_diameter_for_which_designed: 4.130 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-319-0576, 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
4-25EA
NSN: 5340-01-319-0576
FSC: 5340 — Hardware, Commercial
CAGE: 25205 — MOLDED DEVICES, INC. DBA MDI DIV MOLDED DEVICES (USA)
SPECIFICATIONS
materialPLASTIC POLYVINYL CHLORIDE (PVC)
design_typeFRICTION
round_cap_outside_surface_conditionSMOOTH
tube_outside_diameter_for_which_designed4.130 INCHES NOMINAL IN
NSN5340-01-319-0576
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4-25EA 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
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 4.130 INCHES NOMINAL IN
•
MATERIAL: PLASTIC POLYVINYL CHLORIDE (PVC)
•
ROUND CAP OUTSIDE SURFACE CONDITION: SMOOTH
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED4.130 INCHES NOMINAL IN
MATERIALPLASTIC POLYVINYL CHLORIDE (PVC)
ROUND CAP OUTSIDE SURFACE CONDITIONSMOOTH
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
6557715-1Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
4-25Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 4-25EA?
4-25EA is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace 4-25EA?
There are 2 known substitutes for 4-25EA: 6557715-1, 4-25. Substitute compatibility should be verified for your specific system.
What is the NSN for 4-25EA?
4-25EA is cataloged in the U.S. Government catalog under NSN 5340-01-319-0576. 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.