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801-6640797PC11 — TAILPIECE,UNION

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

801-6640797PC11: TAILPIECE,UNION.

The TAILPIECE,UNION is a the manufacturer industrial component. Key specifications include seat_type: GASKET, overall_length: 1.440 INCHES NOMINAL IN, end_connection_type: SWEAT SOLDER, union_outside_diameter: 1.633 INCHES NOMINAL IN, nominal_pipe_size_designation: 0.500 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-412-6841, 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
801-6640797PC11
NSN: 4730-01-412-6841
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
seat_typeGASKET
overall_length1.440 INCHES NOMINAL IN
end_connection_typeSWEAT SOLDER
union_outside_diameter1.633 INCHES NOMINAL IN
nominal_pipe_size_designation0.500 INCHES IN
NSN4730-01-412-6841
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 801-6640797PC11 · 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
•
UNION OUTSIDE DIAMETER: 1.633 INCHES NOMINAL IN
•
NOMINAL PIPE SIZE DESIGNATION: 0.500 INCHES IN
•
END CONNECTION TYPE: SWEAT SOLDER
•
SEAT TYPE: GASKET
TECHNICAL CHARACTERISTICS
UNION OUTSIDE DIAMETER1.633 INCHES NOMINAL IN
NOMINAL PIPE SIZE DESIGNATION0.500 INCHES IN
END CONNECTION TYPESWEAT SOLDER
OVERALL LENGTH1.440 INCHES NOMINAL IN
SEAT TYPEGASKET
SUBSTITUTES & CROSS-REFERENCES 1
6640797Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 801-6640797PC11?
801-6640797PC11 is a TAILPIECE,UNION.
What parts can replace 801-6640797PC11?
There is 1 known substitute for 801-6640797PC11: 6640797. Substitute compatibility should be verified for your specific system.
What is the NSN for 801-6640797PC11?
801-6640797PC11 is cataloged in the U.S. Government catalog under NSN 4730-01-412-6841. 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.