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538983 — RESTRICTOR,FLUID FLOW

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

538983: RESTRICTOR,FLUID FLOW.

The RESTRICTOR,FLUID FLOW is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 CASE, seal_width: 0.254 INCHES MINIMUM AND 0.286 INCHES MAXIMUM IN, temp_rating: -65.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF, housing_bore_diameter: 1.379 INCHES NOMINAL IN, end_item_identification: AH-64 APACHE HELICOPTER, accommodated_shaft_diameter: 0.875 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-580-2252, 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
538983
NSN: 4730-00-580-2252
NIINs: 005802252, 014180624
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL COMP 304 CASE
seal_width0.254 INCHES MINIMUM AND 0.286 INCHES MAXIMUM IN
temp_rating-65.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF
special_features2 PSI MAX OPERATING PRESSURE, MIL-L-23699 OIL LUBRICANT, 2 EACH 0.062 INCH REMOVAL HOLES IN METAL CASE; MFR SOURCE CONTROL REFERENCE (SR-1 7-113100108 CODE 8V613 IN
housing_bore_diameter1.379 INCHES NOMINAL IN
end_item_identificationAH-64 APACHE HELICOPTER
accommodated_shaft_diameter0.875 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencySEAL, PLAIN ENCASED - APU COMPRESSOR AND HYDRAULICPUMP, MAIN TRANSMISSION
NSN4730-00-580-2252
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 538983 · 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: 0.525 INCHES NOMINAL IN
•
THREAD PROVISION: UNTHREADED LOCATION NOT OTHERWISE SPECIFIED
•
DESIGN TYPE: TUBULAR
•
OUTSIDE DIAMETER: 0.275 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM
•
ORIFICE DIAMETER: 0.030 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
LENGTH0.525 INCHES NOMINAL IN
THREAD PROVISIONUNTHREADED LOCATION NOT OTHERWISE SPECIFIED
DESIGN TYPETUBULAR
OUTSIDE DIAMETER0.275 INCHES NOMINAL IN
MATERIALALUMINUM
ORIFICE DIAMETER0.030 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 538983?
538983 is a RESTRICTOR,FLUID FLOW.
What is the NSN for 538983?
538983 is cataloged in the U.S. Government catalog under NSN 4730-00-580-2252. 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.