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Technical Data Sheet
PartsTable / COMPONENT / 250H3-4
250H3-4 ✓ 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 UNION,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, seat_type: GROUND-JOINT, reducer_type: CONCENTRIC, connection_type: THREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, special_features: UNION NUT CADMIUM PLATED INSIDE AND OUT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-277-5505, 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
250H3-4
NSN: 4730-00-277-5505
FSC: 4730
CAGE: 14959 — CRANE CO DIV VALVE DIV (USA)
SPECIFICATIONS
materialSTEEL OVERALL
seat_typeGROUND-JOINT
reducer_typeCONCENTRIC
connection_typeTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
special_featuresUNION NUT CADMIUM PLATED INSIDE AND OUT
style_designatorSCREWED
operating_pressure2000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.750 INCHES ALL ENDS IN
coupling_flange_shapeHEXAGON
maximum_operating_temp550.0 FAHRENHEIT SINGLE RESPONSE DEGF
nominal_overall_length2.250 INCHES IN
NSN4730-00-277-5505
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 250H3-4 · 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
KEY FEATURES
•
CONNECTION TYPE: THREADED INTERNAL PIPE ALL ENDS
•
MEDIA FOR WHICH DESIGNED: WATER-OIL-GAS FIRST RESPONSE
•
NOMINAL PIPE SIZE ACCOMMODATED: 0.750 INCHES ALL ENDS IN
•
STYLE DESIGNATOR: SCREWED
•
DEPARTURE FROM CITED DOCUMENT: AS MODIFIED BY MATERIEL,FINISH,END STYLE,THREAD SIZE,LENGTH,RATED WORKING PRESSURE AND WORKING TEMPERATURE
•
NOMINAL THREAD SIZE: 0.750 INCHES ALL ENDS IN
•
COUPLING FLANGE SHAPE: HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION TYPETHREADED INTERNAL PIPE ALL ENDS
MEDIA FOR WHICH DESIGNEDWATER-OIL-GAS FIRST RESPONSE
NOMINAL PIPE SIZE ACCOMMODATED0.750 INCHES ALL ENDS IN
STYLE DESIGNATORSCREWED
MEDIA FOR WHICH DESIGNEDSTEAM SECOND RESPONSE
DEPARTURE FROM CITED DOCUMENTAS MODIFIED BY MATERIEL,FINISH,END STYLE,THREAD SIZE,LENGTH,RATED WORKING PRESSURE AND WORKING TEMPERATURE
NOMINAL THREAD SIZE0.750 INCHES ALL ENDS IN
COUPLING FLANGE SHAPEHEXAGON
SPECIAL FEATURESUNION NUT CADMIUM PLATED INSIDE AND OUT
NOMINAL OVERALL LENGTH2.250 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
ED8980Interchangeable
interchangeable cross-reference
interchangeable
250HInterchangeable
interchangeable cross-reference
interchangeable
WWU536Interchangeable
interchangeable cross-reference
interchangeable
MIL-U-18250Interchangeable
interchangeable cross-reference
interchangeable
82014Interchangeable
interchangeable cross-reference
interchangeable
425-5666Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 250H3-4?
250H3-4 is a UNION,PIPE.
What parts can replace 250H3-4?
There are 12 known substitutes for 250H3-4: ED8980, 250H, WWU536 and 9 more. Substitute compatibility should be verified for your specific system.
Is 250H3-4 still available?
250H3-4 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026