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FSW 666.5625 — VALVE ASSEMBLY,MANIFOLD

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

FSW 666.5625: VALVE ASSEMBLY,MANIFOLD.

The VALVE ASSEMBLY,MANIFOLD is a the manufacturer industrial component. Key specifications include thread_class: 2B, body_material: STEEL CORROSION RESISTING, connection_type: THREADED INTERNAL TUBE, nominal_thread_size: 0.562 INCHES IN, valve_operation_method: MANUAL, thread_series_designator: UNF. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-446-5908, 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
FSW 666.5625
NSN: 4820-01-446-5908
FSC: 4820 — Valves, Nonpowered
CAGE: 0NB72 — F.S. WELSFORD COMPANY (USA)
SPECIFICATIONS
thread_class2B
body_materialSTEEL CORROSION RESISTING
valve_quantity3
connection_typeTHREADED INTERNAL TUBE
nominal_thread_size0.562 INCHES IN
valve_operation_methodMANUAL
end_connection_quantity2
thread_series_designatorUNF
NSN4820-01-446-5908
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: FSW 666.5625 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
VALVE QUANTITY: 3
•
CONNECTION TYPE: THREADED INTERNAL TUBE
•
END CONNECTION QUANTITY: 2
•
NOMINAL THREAD SIZE: 0.562 INCHES IN
•
BODY MATERIAL: STEEL CORROSION RESISTING
•
THREAD CLASS: 2B
•
THREAD SERIES DESIGNATOR: UNF
•
VALVE OPERATION METHOD: MANUAL
TECHNICAL CHARACTERISTICS
VALVE QUANTITY3
CONNECTION TYPETHREADED INTERNAL TUBE
END CONNECTION QUANTITY2
NOMINAL THREAD SIZE0.562 INCHES IN
BODY MATERIALSTEEL CORROSION RESISTING
THREAD CLASS2B
THREAD SERIES DESIGNATORUNF
VALVE OPERATION METHODMANUAL
SUBSTITUTES & CROSS-REFERENCES 3
HM53-55Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
FSW 666B.5625Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
FSW53666-5625Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 FSW 666.5625?
FSW 666.5625 is a VALVE ASSEMBLY,MANIFOLD.
What parts can replace FSW 666.5625?
There are 3 known substitutes for FSW 666.5625: HM53-55, FSW 666B.5625, FSW53666-5625. Substitute compatibility should be verified for your specific system.
What is the NSN for FSW 666.5625?
FSW 666.5625 is cataloged in the U.S. Government catalog under NSN 4820-01-446-5908. 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.