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PartsTable / COMPONENT / 4-4-4 120401BA
4-4-4 120401BA ✓ 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

SLEEVE,COMPRESSION,TUBE-HOSE FIT. Key specifications include material: COPPER ALLOY OVERALL, nut_style: TUBE COUPLING, flow_angle: 90.0 DEGREES, leg_length: 20.3 MILLIMETERS NOMINAL FIRST END MM, nut_height: 0.730 INCHES NOMINAL IN, seat_angle: 20.0 DEGREES FIRST END. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-921-3241, 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
4-4-4 120401BA
NSN: 4730-00-921-3241
FSC: 4730
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_styleTUBE COUPLING
flow_angle90.0 DEGREES
leg_length20.3 MILLIMETERS NOMINAL FIRST END MM
nut_height0.730 INCHES NOMINAL IN
seat_angle20.0 DEGREES FIRST END
reducer_typeCONCENTRIC
thread_class2A FIRST END A
overall_width0.375 INCHES NOMINAL IN
thread_seriesUNS
overall_length1.220 INCHES NOMINAL IN
connection_typeTHREADED EXTERNAL TUBE FIRST END
NSN4730-00-921-3241
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4-4-4 120401BA · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
MS35763-1064Interchangeable
interchangeable cross-reference
interchangeable
221979Interchangeable
interchangeable cross-reference
interchangeable
J246Interchangeable
interchangeable cross-reference
interchangeable
972906R91Interchangeable
interchangeable cross-reference
interchangeable
62AB-10Interchangeable
interchangeable cross-reference
interchangeable
402117Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4-4-4 120401BA?
4-4-4 120401BA is a SLEEVE,COMPRESSION,TUBE-HOSE FIT.
What parts can replace 4-4-4 120401BA?
There are 27 known substitutes for 4-4-4 120401BA: MS35763-1064, 221979, J246 and 24 more. Substitute compatibility should be verified for your specific system.
Is 4-4-4 120401BA still available?
4-4-4 120401BA 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