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C9557-1 — RESISTOR,FIXED,WIRE WOUND,NONIND

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

C9557-1: RESISTOR,FIXED,WIRE WOUND,NONIND.

RESISTOR,FIXED,WIRE WOUND,NONIND. Key specifications include material: ALUMINUM ALLOY 356.0 OVERALL, overall_width: 3.375 INCHES NOMINAL IN, inside_diameter: 5.250 INCHES NOMINAL IN, style_designator: GENERAL PURPOSE USE, surface_treatment: ANODIZE OVERALL, fastening_device_type: HEXAGON SOCKET HEAD SCREW. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-070-7965, 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
C9557-1
NSN: 4730-01-070-7965
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 356.0 OVERALL
overall_width3.375 INCHES NOMINAL IN
inside_diameter5.250 INCHES NOMINAL IN
style_designatorGENERAL PURPOSE USE
surface_treatmentANODIZE OVERALL
fastening_device_typeHEXAGON SOCKET HEAD SCREW
NSN4730-01-070-7965
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: C9557-1 · 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
•
FASTENING DEVICE TYPE: HEXAGON SOCKET HEAD SCREW
•
STYLE DESIGNATOR: GENERAL PURPOSE USE
•
INSIDE DIAMETER: 5.250 INCHES NOMINAL IN
•
SURFACE TREATMENT: ANODIZE OVERALL
•
MATERIAL: ALUMINUM ALLOY 356.0 OVERALL
TECHNICAL CHARACTERISTICS
FASTENING DEVICE TYPEHEXAGON SOCKET HEAD SCREW
STYLE DESIGNATORGENERAL PURPOSE USE
OVERALL WIDTH3.375 INCHES NOMINAL IN
INSIDE DIAMETER5.250 INCHES NOMINAL IN
SURFACE TREATMENTANODIZE OVERALL
MATERIALALUMINUM ALLOY 356.0 OVERALL
SUBSTITUTES & CROSS-REFERENCES 3
C9557Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
FT2423-3Reference document
Same NSN cross-reference
Reference document — Secondary reference
DEA-03483Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is C9557-1?
C9557-1 is a RESISTOR,FIXED,WIRE WOUND,NONIND.
What parts can replace C9557-1?
There are 3 known substitutes for C9557-1: C9557, FT2423-3, DEA-03483. Substitute compatibility should be verified for your specific system.
What is the NSN for C9557-1?
C9557-1 is cataloged in the U.S. Government catalog under NSN 4730-01-070-7965. 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.