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6404685 — 6404685

✓ Government record, cited
NAVAL SEA SYSTEMS COMMAND · HOSE FITTING
PRODUCT OVERVIEW

6404685: 6404685.

The 6404685 is a NAVAL SEA SYSTEMS COMMAND industrial component. This part is cataloged in the U.S. Government catalog under NSN 4730-01-453-0781, 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
6404685
NSN: 4730-01-453-0781
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
Part Number6404685
ManufacturerNAVAL SEA SYSTEMS COMMAND
NSN4730-01-453-0781
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 6404685 · NAVAL SEA SYSTEMS COMMAND ⚠ 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
•
FLANGE SHAPE: ROUND WITH HOLES SECOND END
•
NOMINAL PIPE SIZE ACCOMMODATED: 0.500 INCHES FIRST END IN
•
FLANGE FACE DESIGN: PLAIN SECOND END
•
CONNECTION STYLE: SOCKET (PIPE) FIRST END
•
BOLT CIRCLE NOMINAL DIAMETER: 2.500 INCHES SECOND END IN
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NOMINAL OVERALL LENGTH: 2.400 INCHES IN
•
CONNECTION TYPE: UNTHREADED INTERNAL PIPE FIRST END
TECHNICAL CHARACTERISTICS
FLANGE SHAPEROUND WITH HOLES SECOND END
NOMINAL PIPE SIZE ACCOMMODATED0.500 INCHES FIRST END IN
FLANGE FACE DESIGNPLAIN SECOND END
CONNECTION STYLESOCKET (PIPE) FIRST END
BOLT CIRCLE NOMINAL DIAMETER2.500 INCHES SECOND END IN
NOMINAL OVERALL LENGTH2.400 INCHES IN
CONNECTION TYPEUNTHREADED INTERNAL PIPE FIRST END
CONNECTION TYPEFLANGE SECOND END
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE BODY
BOLT HOLE NOMINAL DIAMETER0.310 INCHES SECOND END IN
SUBSTITUTES & CROSS-REFERENCES 1
211033889Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 6404685?
6404685 is a 6404685 manufactured by NAVAL SEA SYSTEMS COMMAND.
What parts can replace 6404685?
There is 1 known substitute for 6404685: 211033889. Substitute compatibility should be verified for your specific system.
What is the NSN for 6404685?
6404685 is cataloged in the U.S. Government catalog under NSN 4730-01-453-0781. 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.