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PartsTable / COMPONENT / B63-1
B63-1 ✓ 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 VINYL, design_type: FRICTION, opening_inside_diameter_for_which_designed: 0.875 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 5340-01-499-8390, 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
B63-1
NSN: 5340-01-499-8390
FSC: 5340
CAGE: 03533 — CRANE CARRIER COMPANY, LLC (USA)
SPECIFICATIONS
materialPLASTIC VINYL
design_typeFRICTION
opening_inside_diameter_for_which_designed0.875 INCHES NOMINAL IN
NSN5340-01-499-8390
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: B63-1 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
•
MATERIAL: PLASTIC VINYL
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 0.875 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
DESIGN TYPEFRICTION
MATERIALPLASTIC VINYL
OPENING INSIDE DIAMETER FOR WHICH DESIGNED0.875 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
3277996Interchangeable
interchangeable cross-reference
interchangeable
LB63559Interchangeable
interchangeable cross-reference
interchangeable
LH63611PC1-4Interchangeable
interchangeable cross-reference
interchangeable
63559Interchangeable
interchangeable cross-reference
interchangeable
N63559Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B63-1?
B63-1 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace B63-1?
There are 5 known substitutes for B63-1: 3277996, LB63559, LH63611PC1-4 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B63-1?
B63-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-499-8390. 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