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PartsTable / COMPONENT / B203-16
B203-16 ✓ 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), design_type: FRICTION, inside_diameter_length: 1.890 INCHES NOMINAL IN, round_cap_outside_surface_condition: SMOOTH, opening_inside_diameter_for_which_designed: 1.312 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 5340-01-044-3501, 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
B203-16
NSN: 5340-01-044-3501
FSC: 5340
CAGE: 99017 — CAPLUGS LLC DBA MOKON DIV CAPLUGS (USA)
SPECIFICATIONS
materialPLASTIC, POLYETHYLENE (PP)
design_typeFRICTION
inside_diameter_length1.890 INCHES NOMINAL IN
round_cap_outside_surface_conditionSMOOTH
opening_inside_diameter_for_which_designed1.312 INCHES NOMINAL IN
NSN5340-01-044-3501
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: B203-16 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
•
ROUND CAP OUTSIDE SURFACE CONDITION: SMOOTH
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 1.312 INCHES NOMINAL IN
•
INSIDE DIAMETER LENGTH: 1.890 INCHES NOMINAL IN
•
MATERIAL: PLASTIC, POLYETHYLENE (PP)
TECHNICAL CHARACTERISTICS (FLIS)
DESIGN TYPEFRICTION
ROUND CAP OUTSIDE SURFACE CONDITIONSMOOTH
OPENING INSIDE DIAMETER FOR WHICH DESIGNED1.312 INCHES NOMINAL IN
INSIDE DIAMETER LENGTH1.890 INCHES NOMINAL IN
MATERIALPLASTIC, POLYETHYLENE (PP)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
6150-2Upgraded Successor
successor cross-reference
successor
3122-2Interchangeable
interchangeable cross-reference
interchangeable
CA-202-1Interchangeable
interchangeable cross-reference
interchangeable
CBEK61502Interchangeable
interchangeable cross-reference
interchangeable
PEC61484Interchangeable
interchangeable cross-reference
interchangeable
61420SYInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B203-16?
B203-16 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace B203-16?
There are 7 known substitutes for B203-16: 6150-2, 3122-2, CA-202-1 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B203-16?
B203-16 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-044-3501. 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