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7973863 — RESTRICTOR,FLUID FLOW

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

7973863: RESTRICTOR,FLUID FLOW.

The RESTRICTOR,FLUID FLOW is a the manufacturer industrial component. Key specifications include length: 0.719 INCHES NOMINAL IN, material: STEEL, design_type: TUBULAR, HEX SHAPE, thread_class: 2A LOCATION NOT OTHERWISE SPECIFIED A, thread_length: 0.270 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, thread_series: UNF LOCATION NOT OTHERWISE SPECIFIED. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-177-8529, 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
7973863
NSN: 4730-00-177-8529
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
length0.719 INCHES NOMINAL IN
materialSTEEL
design_typeTUBULAR, HEX SHAPE
thread_class2A LOCATION NOT OTHERWISE SPECIFIED A
thread_length0.270 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
thread_seriesUNF LOCATION NOT OTHERWISE SPECIFIED
orifice_diameter0.013 INCHES MINIMUM AND 0.016 INCHES MAXIMUM IN
outside_diameter0.812 INCHES NOMINAL IN
thread_directionRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
thread_provisionTHREADED LOCATION NOT OTHERWISE SPECIFIED
surface_treatmentCADMIUM
thread_size_designator0-562/18 LOCATION NOT OTHERWISE SPECIFIED
NSN4730-00-177-8529
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 7973863 · 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: 0.719 INCHES NOMINAL IN
•
THREAD PROVISION: THREADED LOCATION NOT OTHERWISE SPECIFIED
•
DESIGN TYPE: TUBULAR, HEX SHAPE
•
THREAD SERIES: UNF LOCATION NOT OTHERWISE SPECIFIED
•
THREAD LENGTH: 0.270 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-631, 1015 THRU 1025 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-S-634, B1112THRU 1213 FED SPEC SINGLE MATERIAL RESPONSE
•
OUTSIDE DIAMETER: 0.812 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
TECHNICAL CHARACTERISTICS
LENGTH0.719 INCHES NOMINAL IN
THREAD PROVISIONTHREADED LOCATION NOT OTHERWISE SPECIFIED
DESIGN TYPETUBULAR, HEX SHAPE
THREAD SERIESUNF LOCATION NOT OTHERWISE SPECIFIED
THREAD LENGTH0.270 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-631, 1015 THRU 1025 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-S-634, B1112THRU 1213 FED SPEC SINGLE MATERIAL RESPONSE
OUTSIDE DIAMETER0.812 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
THREAD SIZE DESIGNATOR0-562/18 LOCATION NOT OTHERWISE SPECIFIED
SURFACE TREATMENTCADMIUM
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
4730001778529Reference document
Same NSN cross-reference
Reference document — Informative 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 7973863?
7973863 is a RESTRICTOR,FLUID FLOW.
What parts can replace 7973863?
There is 1 known substitute for 7973863: 4730001778529. Substitute compatibility should be verified for your specific system.
What is the NSN for 7973863?
7973863 is cataloged in the U.S. Government catalog under NSN 4730-00-177-8529. 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.