PartsTable
Technical Data Sheet
WW-U-531 ✓ 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: IRON ALLOY OVERALL, seat_type: GROUND-JOINT, reducer_type: CONCENTRIC, connection_type: THREADED INTERNAL PIPE FIRST END, connection_style: PLAIN (PIPE) FIRST END, special_features: WARD CLIMAX BRAND,FIG 92,BRASS TO IRON SEAT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-204-3392, 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
WW-U-531
NSN: 4730-00-204-3392
FSC: 4730
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialIRON ALLOY OVERALL
seat_typeGROUND-JOINT
reducer_typeCONCENTRIC
connection_typeTHREADED INTERNAL PIPE FIRST END
connection_stylePLAIN (PIPE) FIRST END
special_featuresWARD CLIMAX BRAND,FIG 92,BRASS TO IRON SEAT
style_designatorSCREWED
surface_treatmentZINC OVERALL
operating_pressure250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size1.000 INCHES SECOND END IN
coupling_flange_shapeHEXAGON
maximum_operating_temp450.0 FAHRENHEIT SECOND RESPONSE DEGF
NSN4730-00-204-3392
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: WW-U-531 · 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
NONDEFINITIVE SPEC/STD DATA: A TYPE AND 1 CLASS
MEDIA FOR WHICH DESIGNED: STEAM SECOND RESPONSE
MATERIAL: STEEL OR STEEL COMP 12L14 SEAT
COUPLING FLANGE SHAPE: HEXAGON
NOMINAL THREAD SIZE: 0.250 INCHES ALL ENDS IN
MAXIMUM OPERATING TEMP: 500.0 FAHRENHEIT SECOND RESPONSE DEGF
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATAA TYPE AND 1 CLASS
MEDIA FOR WHICH DESIGNEDSTEAM SECOND RESPONSE
MATERIALSTEEL OR STEEL COMP 12L14 SEAT
MEDIA FOR WHICH DESIGNEDWATER-OIL-GAS FIRST RESPONSE
COUPLING FLANGE SHAPEHEXAGON
NOMINAL THREAD SIZE0.250 INCHES ALL ENDS IN
MAXIMUM OPERATING TEMP500.0 FAHRENHEIT SECOND RESPONSE DEGF
MATERIALSTEEL UNION
NOMINAL OVERALL LENGTH1.820 INCHES IN
CONNECTION TYPETHREADED INTERNAL PIPE ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
WW-U-531Interchangeable
interchangeable cross-reference
interchangeable
WWU-531-03TAInterchangeable
interchangeable cross-reference
interchangeable
PT1280Interchangeable
interchangeable cross-reference
interchangeable
1631-250Interchangeable
interchangeable cross-reference
interchangeable
BM11399-41Interchangeable
interchangeable cross-reference
interchangeable
45-8395-400-013Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is WW-U-531?
WW-U-531 is a UNION,PIPE.
What parts can replace WW-U-531?
There are 19 known substitutes for WW-U-531: WW-U-531, WWU-531-03TA, PT1280 and 16 more. Substitute compatibility should be verified for your specific system.
Is WW-U-531 still available?
WW-U-531 is currently cancelled.
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