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Technical Data Sheet
PartsTable / COMPONENT / WW-U-516-35
WW-U-516-35 ✓ 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: COPPER ALLOY OVERALL, seat_type: BALL-CONE, reducer_type: CONCENTRIC, connection_type: THREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, style_designator: SCREWED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-287-0420, 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-516-35
NSN: 4730-00-287-0420
FSC: 4730
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
seat_typeBALL-CONE
reducer_typeCONCENTRIC
connection_typeTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
style_designatorSCREWED
operating_pressure250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
nominal_thread_size0.750 INCHES ALL ENDS IN
coupling_flange_shapeHEXAGON
maximum_operating_temp400.0 FAHRENHEIT SINGLE RESPONSE DEGF
nominal_overall_length2.130 INCHES IN
media_for_which_designedSTEAM FIRST RESPONSE
NSN4730-00-287-0420
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: WW-U-516-35 · 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
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
REDUCER TYPE: CONCENTRIC
•
NOMINAL THREAD SIZE: 0.750 INCHES ALL ENDS IN
•
COUPLING FLANGE SHAPE: HEXAGON
•
OPERATING PRESSURE: 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM B62 ALLOY 836 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM B145 ALLOY 838 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM B145 ALLOY 844 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: COPPER ALLOY OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORNPT ALL ENDS
REDUCER TYPECONCENTRIC
NOMINAL THREAD SIZE0.750 INCHES ALL ENDS IN
COUPLING FLANGE SHAPEHEXAGON
OPERATING PRESSURE400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B62 ALLOY 836 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM B145 ALLOY 838 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM B145 ALLOY 844 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OPERATING PRESSURE250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
MATERIALCOPPER ALLOY OVERALL
NONDEFINITIVE SPEC/STD DATA2 TYPE AND A STYLE
STYLE DESIGNATORSCREWED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
AA59617-37Interchangeable
interchangeable cross-reference
interchangeable
402Interchangeable
interchangeable cross-reference
interchangeable
196284Interchangeable
interchangeable cross-reference
interchangeable
775177-012Interchangeable
interchangeable cross-reference
interchangeable
WW-U-516-57Interchangeable
interchangeable cross-reference
interchangeable
A-A-59617Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is WW-U-516-35?
WW-U-516-35 is a UNION,PIPE.
What parts can replace WW-U-516-35?
There are 25 known substitutes for WW-U-516-35: AA59617-37, 402, 196284 and 22 more. Substitute compatibility should be verified for your specific system.
Is WW-U-516-35 still available?
WW-U-516-35 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