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Technical Data Sheet
4904258 ✓ Verified by PartsTable
· ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: PLASTIC, design_type: FRICTION, inside_diameter_length: 1.145 INCHES MINIMUM AND 1.205 INCHES MAXIMUM IN, round_cap_outside_surface_condition: SMOOTH, material_document_and_classification: L-P-390, TYPE 1, CLASS M, GRADE 1, CATEGORY 3 FED SPEC SINGLE MATERIAL RESPONSE, opening_inside_diameter_for_which_designed: 5.165 INCHES MINIMUM AND 5.175 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-139-2896, 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
4904258
NSN: 5340-01-139-2896
FSC: 5340
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialPLASTIC
design_typeFRICTION
inside_diameter_length1.145 INCHES MINIMUM AND 1.205 INCHES MAXIMUM IN
round_cap_outside_surface_conditionSMOOTH
material_document_and_classificationL-P-390, TYPE 1, CLASS M, GRADE 1, CATEGORY 3 FED SPEC SINGLE MATERIAL RESPONSE
opening_inside_diameter_for_which_designed5.165 INCHES MINIMUM AND 5.175 INCHES MAXIMUM IN
NSN5340-01-139-2896
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4904258 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
INSIDE DIAMETER LENGTH: 1.145 INCHES MINIMUM AND 1.205 INCHES MAXIMUM IN
MATERIAL: PLASTIC
MATERIAL DOCUMENT AND CLASSIFICATION: L-P-390, TYPE 1, CLASS M, GRADE 1, CATEGORY 3 FED SPEC SINGLE MATERIAL RESPONSE
ROUND CAP OUTSIDE SURFACE CONDITION: SMOOTH
DESIGN TYPE: FRICTION
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 5.165 INCHES MINIMUM AND 5.175 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
INSIDE DIAMETER LENGTH1.145 INCHES MINIMUM AND 1.205 INCHES MAXIMUM IN
MATERIALPLASTIC
MATERIAL DOCUMENT AND CLASSIFICATIONL-P-390, TYPE 1, CLASS M, GRADE 1, CATEGORY 3 FED SPEC SINGLE MATERIAL RESPONSE
ROUND CAP OUTSIDE SURFACE CONDITIONSMOOTH
DESIGN TYPEFRICTION
OPENING INSIDE DIAMETER FOR WHICH DESIGNED5.165 INCHES MINIMUM AND 5.175 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
B-702Interchangeable
interchangeable cross-reference
interchangeable
AWWA B702Interchangeable
interchangeable cross-reference
interchangeable
51102Interchangeable
interchangeable cross-reference
interchangeable
1102Interchangeable
interchangeable cross-reference
interchangeable
588.50-100003-002Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4904258?
4904258 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace 4904258?
There are 5 known substitutes for 4904258: B-702, AWWA B702, 51102 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4904258?
4904258 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-139-2896. This indicates validated use in U.S. government and defense supply chains.
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