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177586-50 — RESTRICTOR UNIT,FLUID FLOW

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

177586-50: RESTRICTOR UNIT,FLUID FLOW.

The RESTRICTOR UNIT,FLUID FLOW is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING FILTER, valve_size: 0.312 INCHES IN, design_type: STRAIGHT, thread_class: 3B ALL CONNECTIONS, thread_series: UNF ALL CONNECTIONS, overall_length: 3.937 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-593-5969, 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
177586-50
NSN: 4730-00-593-5969
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING FILTER
valve_size0.312 INCHES IN
design_typeSTRAIGHT
thread_class3B ALL CONNECTIONS
thread_seriesUNF ALL CONNECTIONS
overall_length3.937 INCHES NOMINAL IN
pressure_rating4500.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
thread_directionRIGHT-HAND ALL CONNECTIONS
width_across_flats0.625 INCHES NOMINAL IN
end_connection_typeTHREADED FEMALE, GASKET SEAL ALL CONNECTIONS
thread_size_designator0.500-20 ALL CONNECTIONS
end_item_identificationAIRCRAFT APPLICATION
NSN4730-00-593-5969
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 177586-50 · 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
•
FLOW RATE AND FLUID TYPE: 0.216 GALLONS PER MINUTE OIL
•
PRESSURE RATING: 4500.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
•
WIDTH ACROSS FLATS: 0.625 INCHES NOMINAL IN
•
STRAINER TYPE AND QUANTITY: 2 FILTER
•
END CONNECTION COMPONENT TYPE AND SIZE FOR WHICH DESIGNED: U/W 0.312 IN. OD TUBE IN
•
DESIGN TYPE: STRAIGHT
•
THREAD SERIES: UNF ALL CONNECTIONS
•
END CONNECTION TYPE: THREADED FEMALE, GASKET SEAL ALL CONNECTIONS
TECHNICAL CHARACTERISTICS
FLOW RATE AND FLUID TYPE0.216 GALLONS PER MINUTE OIL
PRESSURE RATING4500.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
WIDTH ACROSS FLATS0.625 INCHES NOMINAL IN
STRAINER TYPE AND QUANTITY2 FILTER
END CONNECTION COMPONENT TYPE AND SIZE FOR WHICH DESIGNEDU/W 0.312 IN. OD TUBE IN
DESIGN TYPESTRAIGHT
THREAD SERIESUNF ALL CONNECTIONS
END CONNECTION TYPETHREADED FEMALE, GASKET SEAL ALL CONNECTIONS
OVERALL LENGTH3.937 INCHES NOMINAL IN
VALVE SIZE0.312 INCHES IN
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 177586-50?
177586-50 is a RESTRICTOR UNIT,FLUID FLOW.
What is the NSN for 177586-50?
177586-50 is cataloged in the U.S. Government catalog under NSN 4730-00-593-5969. 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.