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50257REVB ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The EXPANSION JOINT,PIPE is a the manufacturer industrial component. Key specifications include material: RUBBER CHLOROPRENE CLASS CR OVERALL, end_style: VERTEX BELOW CENTER, body_style: PLAIN, SOLID, body_width: 0.400 INCHES MAXIMUM IN, bore_style: W/COUNTERBORE COUNTERBORE FIRST END, ring_style: STRAIGHT GAP. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-432-3876, 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
50257REVB
NSN: 4730-01-432-3876
FSC: 4730
CAGE: 30009 — HYSPAN PRECISION PRODUCTS, INC. DBA HYSPAN PRECISION PRODUCTS INC (USA)
SPECIFICATIONS
materialRUBBER CHLOROPRENE CLASS CR OVERALL
end_styleVERTEX BELOW CENTER
body_stylePLAIN, SOLID
body_width0.400 INCHES MAXIMUM IN
bore_styleW/COUNTERBORE COUNTERBORE FIRST END
ring_styleSTRAIGHT GAP
tooth_formSTANDARD
body_height0.360 INCHES MAXIMUM IN
body_length0.450 INCHES MAXIMUM IN
bulb_length11.620 INCHES NOMINAL IN
usage_designEXTERNAL
bulb_diameter0.190 INCHES NOMINAL IN
NSN4730-01-432-3876
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 50257REVB · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
24319Interchangeable
interchangeable cross-reference
interchangeable
50257Interchangeable
interchangeable cross-reference
interchangeable
SCB69329Interchangeable
interchangeable cross-reference
interchangeable
71844Interchangeable
interchangeable cross-reference
interchangeable
30257Interchangeable
interchangeable cross-reference
interchangeable
7376248Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 50257REVB?
50257REVB is a EXPANSION JOINT,PIPE.
What parts can replace 50257REVB?
There are 13 known substitutes for 50257REVB: 24319, 50257, SCB69329 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 50257REVB?
50257REVB is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-432-3876. 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