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Technical Data Sheet
MS90376-10RB ✓ 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, overall_diameter: 0.840 INCHES NOMINAL IN, special_features: BLACK, inside_diameter_length: 0.375 INCHES NOMINAL IN, round_cap_outside_surface_condition: SMOOTH. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-426-1656, 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
MS90376-10RB
NSN: 5340-01-426-1656
FSC: 5340
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialPLASTIC
design_typeFRICTION
overall_diameter0.840 INCHES NOMINAL IN
special_featuresBLACK
inside_diameter_length0.375 INCHES NOMINAL IN
round_cap_outside_surface_conditionSMOOTH
opening_inside_diameter_for_which_designed0.665 INCHES NOMINAL IN
NSN5340-01-426-1656
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS90376-10RB 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
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 0.6550 INCHES MINIMUM AND 0.6750 INCHES MAXIMUM IN
ROUND CAP OUTSIDE SURFACE CONDITION: SMOOTH
INSIDE DIAMETER LENGTH: 0.4690 INCHES MINIMUM AND 0.5310 INCHES MAXIMUM IN
MATERIAL: PLASTIC
DESIGN TYPE: FRICTION
OVERALL DIAMETER: 0.8090 INCHES MINIMUM AND 0.8710 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.6550 INCHES MINIMUM AND 0.6750 INCHES MAXIMUM IN
ROUND CAP OUTSIDE SURFACE CONDITIONSMOOTH
INSIDE DIAMETER LENGTH0.4690 INCHES MINIMUM AND 0.5310 INCHES MAXIMUM IN
MATERIALPLASTIC
DESIGN TYPEFRICTION
SPECIAL FEATURESTHE ITEM IS MADE OUT OF MIL-B-81705,TYPE 1
OVERALL DIAMETER0.8090 INCHES MINIMUM AND 0.8710 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
6971-0014Upgraded Successor
successor cross-reference
successor
MS90376-12RBUpgraded Successor
successor cross-reference
successor
M85049/138-24CUpgraded Successor
successor cross-reference
successor
6972-0012Upgraded Successor
successor cross-reference
successor
M85049/138-22CUpgraded Successor
successor cross-reference
successor
M85049/138-20CUpgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS90376-10RB?
MS90376-10RB is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace MS90376-10RB?
There are 11 known substitutes for MS90376-10RB: 6971-0014, MS90376-12RB, M85049/138-24C and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS90376-10RB?
MS90376-10RB is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-426-1656. This indicates validated use in U.S. government and defense supply chains.
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