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4073904 — RESTRICTOR,FLUID FLOW

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

4073904: RESTRICTOR,FLUID FLOW.

The RESTRICTOR,FLUID FLOW is a the manufacturer industrial component. Key specifications include length: 1.186 INCHES NOMINAL IN, material: TITANIUM ALLOY UNS R56400, design_type: TUBULAR, HEX SHAPE, thread_class: 3A LOCATION NOT OTHERWISE SPECIFIED A, thread_length: 0.239 INCHES NOMINAL SECOND PROVISION IN, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF) LOCATION NOT OTHERWISE SPECIFIED. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-252-7061, 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
4073904
NSN: 4730-01-252-7061
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
length1.186 INCHES NOMINAL IN
materialTITANIUM ALLOY UNS R56400
design_typeTUBULAR, HEX SHAPE
thread_class3A LOCATION NOT OTHERWISE SPECIFIED A
thread_length0.239 INCHES NOMINAL SECOND PROVISION IN
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF) LOCATION NOT OTHERWISE SPECIFIED
orifice_diameter0.130 INCHES NOMINAL IN
outside_diameter0.4735 INCHES NOMINAL IN
special_featuresU/O F100-PW-220 ACFT ENG
thread_directionRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
thread_provisionTHREADED LOCATION NOT OTHERWISE SPECIFIED
thread_size_designator0.5625-18 LOCATION NOT OTHERWISE SPECIFIED
NSN4730-01-252-7061
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4073904 · 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: 1.186 INCHES NOMINAL IN
•
THREAD PROVISION: THREADED LOCATION NOT OTHERWISE SPECIFIED
•
DESIGN TYPE: TUBULAR, HEX SHAPE
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF) LOCATION NOT OTHERWISE SPECIFIED
•
THREAD LENGTH: 0.239 INCHES NOMINAL SECOND PROVISION IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE
•
OUTSIDE DIAMETER: 0.4735 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
LENGTH1.186 INCHES NOMINAL IN
THREAD PROVISIONTHREADED LOCATION NOT OTHERWISE SPECIFIED
DESIGN TYPETUBULAR, HEX SHAPE
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF) LOCATION NOT OTHERWISE SPECIFIED
THREAD LENGTH0.239 INCHES NOMINAL SECOND PROVISION IN
THREAD LENGTH0.309 INCHES NOMINAL FIRST PROVISION IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 4928 ASSN STD SINGLE MATERIAL RESPONSE
OUTSIDE DIAMETER0.4735 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
THREAD SIZE DESIGNATOR0.5625-18 LOCATION NOT OTHERWISE SPECIFIED
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 1
4069898Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementDemilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is 4073904?
4073904 is a RESTRICTOR,FLUID FLOW.
What parts can replace 4073904?
There is 1 known substitute for 4073904: 4069898. Substitute compatibility should be verified for your specific system.
What is the NSN for 4073904?
4073904 is cataloged in the U.S. Government catalog under NSN 4730-01-252-7061. 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.