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801-6640820PC6 — NUT,UNION

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

801-6640820PC6: NUT,UNION.

The NUT,UNION is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, nut_style: HEXAGON, thread_series: NPT, thread_direction: RIGHT-HAND, nominal_thread_size: 0.500 INCHES IN, end_item_identification: VALVE, SWING C;SEAWOLF CLASS SSN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-418-6473, 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
801-6640820PC6
NSN: 4730-01-418-6473
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
nut_styleHEXAGON
thread_seriesNPT
thread_directionRIGHT-HAND
nominal_thread_size0.500 INCHES IN
end_item_identificationVALVE, SWING C;SEAWOLF CLASS SSN
thread_quantity_per_inch14
material_document_and_classificationQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN4730-01-418-6473
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 801-6640820PC6 · 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
•
THREAD SERIES: NPT
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
NUT STYLE: HEXAGON
•
THREAD QUANTITY PER INCH: 14
•
MATERIAL: NICKEL ALLOY OVERALL
TECHNICAL CHARACTERISTICS
THREAD SERIESNPT
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.500 INCHES IN
NUT STYLEHEXAGON
END ITEM IDENTIFICATIONVALVE, SWING C;SEAWOLF CLASS SSN
THREAD QUANTITY PER INCH14
MATERIALNICKEL ALLOY OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
2633-021-01PC6Reference document
Same NSN cross-reference
Reference document — Secondary reference
6640820Reference 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 801-6640820PC6?
801-6640820PC6 is a NUT,UNION.
What parts can replace 801-6640820PC6?
There are 2 known substitutes for 801-6640820PC6: 2633-021-01PC6, 6640820. Substitute compatibility should be verified for your specific system.
What is the NSN for 801-6640820PC6?
801-6640820PC6 is cataloged in the U.S. Government catalog under NSN 4730-01-418-6473. 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.