PartsTable
Technical Data Sheet
US-44 ✓ 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 COUPLING,TUBE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, seat_angle: 45.0 DEGREES FIRST END, thread_class: 2A FIRST END A, connection_type: THREADED EXTERNAL TUBE FIRST END, connection_style: SOCKET (TUBE) SECOND END, style_designator: RIGID, SHORT CENTER WRENCHING FACILITY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-8863, 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
US-44
NSN: 4730-00-278-8863
FSC: 4730
CAGE: 33334 — KEROTEST MANUFACTURING CORP. (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
seat_angle45.0 DEGREES FIRST END
thread_class2A FIRST END A
connection_typeTHREADED EXTERNAL TUBE FIRST END
connection_styleSOCKET (TUBE) SECOND END
style_designatorRIGID, SHORT CENTER WRENCHING FACILITY
nominal_thread_size0.437 INCHES FIRST END IN
nominal_overall_length1.500 INCHES IN
thread_series_designatorUNF FIRST END
nominal_outside_diameter_tube_accommodated0.250 INCHES SECOND END IN
tubing_wall_nominal_thickness_for_which_designed0.016 INCHES SECOND END IN
NSN4730-00-278-8863
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: US-44 · 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 STYLE: FLARED (TUBE) ALL ENDS
SEAT ANGLE: 45.0 DEGREES ALL ENDS
THREAD CLASS: 2B ALL ENDS
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES ALL ENDS IN
STYLE DESIGNATOR: SWIVEL, WRENCHING FACILITIES EACH END
NOMINAL THREAD SIZE: 0.438 INCHES ALL ENDS IN
MATERIAL: COPPER ALLOY OVERALL
THREAD SERIES DESIGNATOR: UNF ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION STYLEFLARED (TUBE) ALL ENDS
SEAT ANGLE45.0 DEGREES ALL ENDS
THREAD CLASS2B ALL ENDS
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES ALL ENDS IN
STYLE DESIGNATORSWIVEL, WRENCHING FACILITIES EACH END
NOMINAL THREAD SIZE0.438 INCHES ALL ENDS IN
MATERIALCOPPER ALLOY OVERALL
THREAD SERIES DESIGNATORUNF ALL ENDS
CONNECTION TYPETHREADED INTERNAL TUBE ALL ENDS
NOMINAL OVERALL LENGTH1.312 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
A-13563Interchangeable
interchangeable cross-reference
interchangeable
670F1-4Interchangeable
interchangeable cross-reference
interchangeable
3591Interchangeable
interchangeable cross-reference
interchangeable
14FSV-4Interchangeable
interchangeable cross-reference
interchangeable
US-44Interchangeable
interchangeable cross-reference
interchangeable
672-FS US-44Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is US-44?
US-44 is a COUPLING,TUBE.
What parts can replace US-44?
There are 7 known substitutes for US-44: A-13563, 670F1-4, 3591 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for US-44?
US-44 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-8863. This indicates validated use in U.S. government and defense supply chains.
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