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177586-155 — RESTRICTOR,FLUID FLOW

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

177586-155: RESTRICTOR,FLUID FLOW.

The RESTRICTOR,FLUID FLOW is a the manufacturer industrial component. Key specifications include length: 3.937 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING, design_type: TUBULAR, thread_class: B3 LOCATION NOT OTHERWISE SPECIFIED, thread_length: 0.625 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, thread_series: UNF FIRST PROVISION. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-326-0032, 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
177586-155
NSN: 4730-00-326-0032
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
length3.937 INCHES NOMINAL IN
materialSTEEL CORROSION RESISTING
design_typeTUBULAR
thread_classB3 LOCATION NOT OTHERWISE SPECIFIED
thread_length0.625 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
thread_seriesUNF FIRST PROVISION
orifice_diameter0.155 INCHES NOMINAL IN
outside_diameter0.720 INCHES NOMINAL IN
thread_directionRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
thread_provisionTHREADED LOCATION NOT OTHERWISE SPECIFIED
fsc_application_dataHYDRAULIC SYSTEM,AIRCRAFT
thread_size_designator7/16 LOCATION NOT OTHERWISE SPECIFIED
NSN4730-00-326-0032
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 177586-155 · 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
•
FSC APPLICATION DATA: HYDRAULIC SYSTEM,AIRCRAFT
•
LENGTH: 3.937 INCHES NOMINAL IN
•
THREAD PROVISION: THREADED LOCATION NOT OTHERWISE SPECIFIED
•
DESIGN TYPE: TUBULAR
•
THREAD SERIES: UNF FIRST PROVISION
•
THREAD LENGTH: 0.625 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
HOSE/TUBE SIZE FOR WHICH DESIGNED: W/1/4 IN. OD TUBE IN
•
OUTSIDE DIAMETER: 0.720 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATAHYDRAULIC SYSTEM,AIRCRAFT
LENGTH3.937 INCHES NOMINAL IN
THREAD PROVISIONTHREADED LOCATION NOT OTHERWISE SPECIFIED
DESIGN TYPETUBULAR
THREAD SERIESUNF FIRST PROVISION
THREAD LENGTH0.625 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
HOSE/TUBE SIZE FOR WHICH DESIGNEDW/1/4 IN. OD TUBE IN
OUTSIDE DIAMETER0.720 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
THREAD SIZE DESIGNATOR7/16 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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandDemilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is 177586-155?
177586-155 is a RESTRICTOR,FLUID FLOW.
What is the NSN for 177586-155?
177586-155 is cataloged in the U.S. Government catalog under NSN 4730-00-326-0032. 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.