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UA538951 — RESTRICTOR,FLUID FLOW

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

UA538951: RESTRICTOR,FLUID FLOW.

The RESTRICTOR,FLUID FLOW is a the manufacturer industrial component. Key specifications include length: 1.188 INCHES NOMINAL IN, material: ALUMINUM ALLOY, design_type: TUBULAR, thread_class: 3A LOCATION NOT OTHERWISE SPECIFIED A, thread_length: 0.469 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF) LOCATION NOT OTHERWISE SPECIFIED. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-337-7607, 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
UA538951
NSN: 4730-01-337-7607
NIINs: 013377607, 013377608, 013377609, 013381442, 013381443, 013406089, 013476091, 013586354, 013586355, 013586356, 013586357, 013586358, 013588734, 013672205, 013672206, 013672207, 013672208, 013773994, 013915872, 013990818, 013990820, 013990823, 014346655, 014346656, 014346657, 014428531, 014428542, 014549351
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 78943 — TRIUMPH THERMAL SYSTEMS, LLC (USA)
SPECIFICATIONS
length1.188 INCHES NOMINAL IN
materialALUMINUM ALLOY
design_typeTUBULAR
thread_class3A LOCATION NOT OTHERWISE SPECIFIED A
thread_length0.469 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF) LOCATION NOT OTHERWISE SPECIFIED
orifice_diameter0.595 INCHES NOMINAL IN
outside_diameter0.375 INCHES NOMINAL IN
special_featuresMATERIAL IAW AMS 4150
thread_directionRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
thread_provisionTHREADED LOCATION NOT OTHERWISE SPECIFIED
surface_treatmentANODIZE
NSN4730-01-337-7607
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: UA538951 · 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
•
LENGTH: 1.188 INCHES NOMINAL IN
•
THREAD PROVISION: THREADED ALL PROVISIONS
•
DESIGN TYPE: TUBULAR, HEX SHAPE
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF) FIRST PROVISION
•
THREAD LENGTH: 0.469 INCHES NOMINAL FIRST PROVISION IN
•
HOSE/TUBE SIZE FOR WHICH DESIGNED: 3/8 IN. OD TUBE IN
TECHNICAL CHARACTERISTICS
LENGTH1.188 INCHES NOMINAL IN
THREAD PROVISIONTHREADED ALL PROVISIONS
DESIGN TYPETUBULAR, HEX SHAPE
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF) FIRST PROVISION
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF) SECOND PROVISION
THREAD LENGTH0.469 INCHES NOMINAL FIRST PROVISION IN
THREAD LENGTH0.469 INCHES NOMINAL SECOND PROVISION IN
HOSE/TUBE SIZE FOR WHICH DESIGNED3/8 IN. OD TUBE IN
THREAD DIRECTIONRIGHT-HAND FIRST PROVISION
THREAD DIRECTIONRIGHT-HAND SECOND PROVISION
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 UA538951?
UA538951 is a RESTRICTOR,FLUID FLOW.
What is the NSN for UA538951?
UA538951 is cataloged in the U.S. Government catalog under NSN 4730-01-337-7607. 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.