PartsTable
Technical Data Sheet
U3-4A ✓ 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 ADAPTER,STRAIGHT,PIPE TO TUBE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 11 OVERALL, seat_angle: 45.0 DEGREES FIRST END, thread_class: 2A FIRST END A, connection_type: THREADED INTERNAL PIPE SECOND END, connection_style: PLAIN (PIPE) SECOND END, nominal_thread_size: 0.438 INCHES FIRST END IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-289-0378, 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
U3-4A
NSN: 4730-00-289-0378
FSC: 4730
CAGE: 33334 — KEROTEST MANUFACTURING CORP. (USA)
SPECIFICATIONS
materialCOPPER ALLOY 11 OVERALL
seat_angle45.0 DEGREES FIRST END
thread_class2A FIRST END A
connection_typeTHREADED INTERNAL PIPE SECOND END
connection_stylePLAIN (PIPE) SECOND END
nominal_thread_size0.438 INCHES FIRST END IN
nominal_overall_length1.031 INCHES IN
thread_series_designatorUNF FIRST END
nominal_pipe_size_accommodated0.125 INCHES SECOND END IN
material_document_and_classificationQQ-B-613,COMP 11 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
nominal_outside_diameter_tube_accommodated0.250 INCHES FIRST END IN
NSN4730-00-289-0378
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: U3-4A · 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
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-613,COMP 11 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD SERIES DESIGNATOR: NPTF SECOND END
THREAD CLASS: 2A FIRST END A
SEAT ANGLE: 45.0 DEGREES FIRST END
NOMINAL THREAD SIZE: 0.438 INCHES FIRST END IN
NOMINAL OVERALL LENGTH: 1.031 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-613,COMP 11 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD SERIES DESIGNATORNPTF SECOND END
THREAD CLASS2A FIRST END A
SEAT ANGLE45.0 DEGREES FIRST END
NOMINAL THREAD SIZE0.438 INCHES FIRST END IN
THREAD SERIES DESIGNATORUNF FIRST END
NOMINAL OVERALL LENGTH1.031 INCHES IN
NOMINAL THREAD SIZE0.125 INCHES SECOND END IN
MATERIALCOPPER ALLOY 11 OVERALL
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
0204-8-8BInterchangeable
interchangeable cross-reference
interchangeable
46X8X8Interchangeable
interchangeable cross-reference
interchangeable
J512Interchangeable
interchangeable cross-reference
interchangeable
U1-4CInterchangeable
interchangeable cross-reference
interchangeable
648-F-04X06Interchangeable
interchangeable cross-reference
interchangeable
A1197Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is U3-4A?
U3-4A is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace U3-4A?
There are 28 known substitutes for U3-4A: 0204-8-8B, 46X8X8, J512 and 25 more. Substitute compatibility should be verified for your specific system.
Is U3-4A still available?
U3-4A is currently cancelled.
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