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MS90376-25YB — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

MS90376-25YB: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: PLASTIC, design_type: FRICTION, overall_diameter: 1.779 INCHES MINIMUM AND 1.841 INCHES MAXIMUM IN, material_document_and_classification: MIL-P-81705, TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE, tube_outside_diameter_for_which_designed: 1.530 INCHES MINIMUM AND 1.550 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-445-9377, 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
MS90376-25YB
NSN: 5340-01-445-9377
FSC: 5340 — Hardware, Commercial
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialPLASTIC
design_typeFRICTION
overall_diameter1.779 INCHES MINIMUM AND 1.841 INCHES MAXIMUM IN
material_document_and_classificationMIL-P-81705, TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE
tube_outside_diameter_for_which_designed1.530 INCHES MINIMUM AND 1.550 INCHES MAXIMUM IN
NSN5340-01-445-9377
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS90376-25YB 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
•
OVERALL DIAMETER: 1.779 INCHES MINIMUM AND 1.841 INCHES MAXIMUM IN
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 1.530 INCHES MINIMUM AND 1.550 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-P-81705, TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE
•
MATERIAL: PLASTIC
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OVERALL DIAMETER1.779 INCHES MINIMUM AND 1.841 INCHES MAXIMUM IN
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED1.530 INCHES MINIMUM AND 1.550 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-P-81705, TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE
MATERIALPLASTIC
SUBSTITUTES & CROSS-REFERENCES 3
AS90376-25YBReference document
Same NSN cross-reference
Reference document — Secondary reference
SAE-AS85049/138Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
M85049-138-51CReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS90376-25YB?
MS90376-25YB is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace MS90376-25YB?
There are 3 known substitutes for MS90376-25YB: AS90376-25YB, SAE-AS85049/138, M85049-138-51C. Substitute compatibility should be verified for your specific system.
What is the NSN for MS90376-25YB?
MS90376-25YB is cataloged in the U.S. Government catalog under NSN 5340-01-445-9377. This indicates validated use in U.S. government and defense supply chains.
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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.