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Technical Data Sheet
PartsTable / COMPONENT / MS90376-9R
MS90376-9R ✓ 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, POLYETHYLENE (PP), special_features: INSERT:NOT INCLUDED. CHAIN: NOT INCLUDED.

MOUNTING METHOD: PRESS FIT. DIAMETER: 0.750 INCHES NOMINAL. 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 5340-01-445-4326, 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
MS90376-9R
NSN: 5340-01-445-4326
FSC: 5340
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialPLASTIC, POLYETHYLENE (PP)
special_featuresINSERT:NOT INCLUDED. CHAIN: NOT INCLUDED. MOUNTING METHOD: PRESS FIT. DIAMETER: 0.750 INCHES NOMINAL. IN
NSN5340-01-445-4326
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS90376-9R 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
•
MATERIAL: PLASTIC, POLYETHYLENE (PP)
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESINSERT:NOT INCLUDED. CHAIN: NOT INCLUDED. MOUNTING METHOD: PRESS FIT. DIAMETER: 0.750 INCHES NOMINAL. IN
MATERIALPLASTIC, POLYETHYLENE (PP)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
686B012810Upgraded Successor
successor cross-reference
successor
NAS831-10Upgraded Successor
successor cross-reference
successor
70777Upgraded Successor
successor cross-reference
successor
M5501/1-R6Upgraded Successor
successor cross-reference
successor
MILC5501Upgraded Successor
successor cross-reference
successor
MIL-C-5501/1Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS90376-9R?
MS90376-9R is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace MS90376-9R?
There are 21 known substitutes for MS90376-9R: 686B012810, NAS831-10, 70777 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS90376-9R?
MS90376-9R is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-445-4326. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026