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50251REVB ✓ 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: STEEL OVERALL, dial_size: 2-1/2 IN. DIA IN, bezel_type: SLIPS-ON, scale_name: PRESSURE, scale_type: SINGLE, scale_range: +0.000 TO 300.000 POUNDS PRESSURE PER SQUARE INCH LBS.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-432-3873, 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
50251REVB
NSN: 4730-01-432-3873
FSC: 4730
CAGE: 70510 — HYSPAN PRECISION PRODUCTS, INC. (USA)
SPECIFICATIONS
materialSTEEL OVERALL
dial_size2-1/2 IN. DIA IN
bezel_typeSLIPS-ON
scale_namePRESSURE
scale_typeSINGLE
scale_range+0.000 TO 300.000 POUNDS PRESSURE PER SQUARE INCH LBS
pointer_typeINDICATING
usage_designW/ALL MEDIA NONCORROSIVE TO BRASS
adjustabilityNONADJUSTABLE
largest_width0.250 INCHES SINGLE END IN
overall_depth1.188 INCHES NOMINAL IN
overall_width0.250 INCHES IN
NSN4730-01-432-3873
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 50251REVB · 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 6
A4138Interchangeable
interchangeable cross-reference
interchangeable
103S2Interchangeable
interchangeable cross-reference
interchangeable
50251Interchangeable
interchangeable cross-reference
interchangeable
1000UInterchangeable
interchangeable cross-reference
interchangeable
23-2 1-2 1-8-0-300PS1Interchangeable
interchangeable cross-reference
interchangeable
002-1320-000Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 50251REVB?
50251REVB is a EXPANSION JOINT,PIPE.
What parts can replace 50251REVB?
There are 6 known substitutes for 50251REVB: A4138, 103S2, 50251 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 50251REVB?
50251REVB is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-432-3873. 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