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801-6640797PC47 — TAILPIECE,UNION

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

801-6640797PC47: TAILPIECE,UNION.

The TAILPIECE,UNION is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 715, seat_type: GASKET, thread_size: 1/2-14, overall_length: 2.190 INCHES NOMINAL IN, special_features: 150 DEGREE WORKING TEMP, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-417-2819, 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
801-6640797PC47
NSN: 4730-01-417-2819
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY 715
seat_typeGASKET
thread_size1/2-14
overall_length2.190 INCHES NOMINAL IN
special_features150 DEGREE WORKING TEMP
thread_directionRIGHT-HAND
end_connection_typeTHREADED
screw_thread_locationEXTERNAL
union_outside_diameter1.625 INCHES MINIMUM AND 1.640 INCHES MAXIMUM IN
end_item_identificationSEAWOLF CLASS SSN
screw_thread_series_designatorNPTF
NSN4730-01-417-2819
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 801-6640797PC47 · 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: 1.625 INCHES MINIMUM AND 1.640 INCHES MAXIMUM IN
•
END CONNECTION TYPE: THREADED
•
SEAT TYPE: GASKET
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD SIZE: 1/2-14
•
SCREW THREAD SERIES DESIGNATOR: NPTF
TECHNICAL CHARACTERISTICS
UNION OUTSIDE DIAMETER1.625 INCHES MINIMUM AND 1.640 INCHES MAXIMUM IN
END CONNECTION TYPETHREADED
OVERALL LENGTH2.190 INCHES NOMINAL IN
SEAT TYPEGASKET
THREAD DIRECTIONRIGHT-HAND
THREAD SIZE1/2-14
SPECIAL FEATURES150 DEGREE WORKING TEMP
SCREW THREAD SERIES DESIGNATORNPTF
END ITEM IDENTIFICATIONSEAWOLF CLASS SSN
SCREW THREAD LOCATIONEXTERNAL
SUBSTITUTES & CROSS-REFERENCES 2
6640797Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
2633-791-01Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 801-6640797PC47?
801-6640797PC47 is a TAILPIECE,UNION.
What parts can replace 801-6640797PC47?
There are 2 known substitutes for 801-6640797PC47: 6640797, 2633-791-01. Substitute compatibility should be verified for your specific system.
What is the NSN for 801-6640797PC47?
801-6640797PC47 is cataloged in the U.S. Government catalog under NSN 4730-01-417-2819. 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.