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801-6640833ASSY26 — UNION,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

801-6640833ASSY26: UNION,PIPE.

The UNION,PIPE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 400 TUBING, design_form: PREBENT, wall_thickness: 0.120 INCHES MINIMUM IN, thread_direction: RIGHT-HAND FIRST END, features_provided: JOINT GASKETS, mating_end_quantity: 1 FIRST END. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-690-3591, 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
801-6640833ASSY26
NSN: 4730-01-690-3591
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY 400 TUBING
design_formPREBENT
wall_thickness0.120 INCHES MINIMUM IN
special_featuresTUBE PREBENT 90 DEGREES; UNION TAILPIECE WELDED TO TUBE; UNION NUT AND GASKET INCLUDED; SECOND END PLAIN TUBE; .25 NP TAILPIECE; 228 DEGREE F AT 50PSI RATING
thread_directionRIGHT-HAND FIRST END
features_providedJOINT GASKETS
mating_end_quantity1 FIRST END
nominal_thread_size1.500 INCHES FIRST END IN
end_connection_styleUNTHREADED EXTERNAL SECOND END
tube_outside_diameter0.540 INCHES NOMINAL IN
end_item_identificationSHIP; VALVES
thread_series_designatorNPSH FIRST END
NSN4730-01-690-3591
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 801-6640833ASSY26 · 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
801-6640833Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
2633-791-03Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedAcquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 801-6640833ASSY26?
801-6640833ASSY26 is a UNION,PIPE.
What parts can replace 801-6640833ASSY26?
There are 2 known substitutes for 801-6640833ASSY26: 801-6640833, 2633-791-03. Substitute compatibility should be verified for your specific system.
What is the NSN for 801-6640833ASSY26?
801-6640833ASSY26 is cataloged in the U.S. Government catalog under NSN 4730-01-690-3591. 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.