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UA540159-415 — RESTRICTOR UNIT,FLUID FLOW

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

UA540159-415: RESTRICTOR UNIT,FLUID FLOW.

The RESTRICTOR UNIT,FLUID FLOW is a the manufacturer industrial component. Key specifications include diameter: 0.174 INCHES NOMINAL IN, material: COPPER ALLOY BODY, design_type: STRAIGHT, thread_class: 3A SECOND CONNECTION A, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF) SECOND CONNECTION, overall_length: 1.062 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-368-1565, 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
UA540159-415
NSN: 4730-01-368-1565
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 78943 — TRIUMPH THERMAL SYSTEMS, LLC (USA)
SPECIFICATIONS
diameter0.174 INCHES NOMINAL IN
materialCOPPER ALLOY BODY
design_typeSTRAIGHT
thread_class3A SECOND CONNECTION A
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF) SECOND CONNECTION
overall_length1.062 INCHES NOMINAL IN
orifice_diameter0.187 INCHES NOMINAL IN
special_featuresMATERIAL 0.688 AA6061-T6 HEX STK.; ANODIZE PER MIL-A-8625 TYPE 2,CLASS 2,BLUE; CHEM FILM WITH IRIDITE 14.2 PER MIL-C-5541 CLASS 3
thread_directionRIGHT-HAND THIRD CONNECTION
end_connection_typeTHREADED MALE, FLARELESS TUBE LOCATION NOT OTHERWISE SPECIFIED
thread_size_designator7/16-20 LOCATION NOT OTHERWISE SPECIFIED
end_item_identificationFCS RADAR
NSN4730-01-368-1565
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: UA540159-415 · 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
•
DESIGN TYPE: STRAIGHT
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF) SECOND CONNECTION
•
END CONNECTION TYPE: THREADED MALE, FLARELESS TUBE LOCATION NOT OTHERWISE SPECIFIED
•
DIAMETER: 0.174 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND THIRD CONNECTION
TECHNICAL CHARACTERISTICS
DESIGN TYPESTRAIGHT
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF) SECOND CONNECTION
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF) THIRD CONNECTION
END CONNECTION TYPETHREADED MALE, FLARELESS TUBE LOCATION NOT OTHERWISE SPECIFIED
DIAMETER0.174 INCHES NOMINAL IN
OVERALL LENGTH1.062 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND THIRD CONNECTION
THREAD DIRECTIONRIGHT-HAND SECOND CONNECTION
THREAD SIZE DESIGNATOR7/16-20 LOCATION NOT OTHERWISE SPECIFIED
SPECIAL FEATURESMATERIAL 0.688 AA6061-T6 HEX STK.; ANODIZE PER MIL-A-8625 TYPE 2,CLASS 2,BLUE; CHEM FILM WITH IRIDITE 14.2 PER MIL-C-5541 CLASS 3
SUBSTITUTES & CROSS-REFERENCES 1
UA540159Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is UA540159-415?
UA540159-415 is a RESTRICTOR UNIT,FLUID FLOW.
What parts can replace UA540159-415?
There is 1 known substitute for UA540159-415: UA540159. Substitute compatibility should be verified for your specific system.
What is the NSN for UA540159-415?
UA540159-415 is cataloged in the U.S. Government catalog under NSN 4730-01-368-1565. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.