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4537800-657 — BOLT,FLUID PASSAGE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

4537800-657: BOLT,FLUID PASSAGE.

The BOLT,FLUID PASSAGE is a the manufacturer industrial component. Key specifications include material: STEEL, body_style: STEPPED, surface_treatment: PASSIVATE, wrenching_feature_style: HEXAGON, first_end_connection_type: THREADED INTERNAL PIPE. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-184-1942, 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
4537800-657
NSN: 4730-01-184-1942
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: S3465 — BAE SYSTEMS HAGGLUNDS AB (SWE)
SPECIFICATIONS
materialSTEEL
body_styleSTEPPED
surface_treatmentPASSIVATE
wrenching_feature_styleHEXAGON
first_end_connection_typeTHREADED INTERNAL PIPE
NSN4730-01-184-1942
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4537800-657 · 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
SUBSTITUTES & CROSS-REFERENCES 2
N915036010100Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
915036010100Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 4537800-657?
4537800-657 is a BOLT,FLUID PASSAGE.
What parts can replace 4537800-657?
There are 2 known substitutes for 4537800-657: N915036010100, 915036010100. Substitute compatibility should be verified for your specific system.
What is the NSN for 4537800-657?
4537800-657 is cataloged in the U.S. Government catalog under NSN 4730-01-184-1942. 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.