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DF330661-FN20 — ADAPTER ASSEMBLY,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

DF330661-FN20: ADAPTER ASSEMBLY,VALVE.

The ADAPTER ASSEMBLY,VALVE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY, overall_length: 4.620 INCHES NOMINAL IN, stem_actuating_end_type: THREADED EXTERNALLY, largest_outside_diameter: 0.989 INCHES NOMINAL IN, valve_size_for_which_designed: 0.250 INCHES IN, valve_type_for_which_designed: BALL. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-357-3558, 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
DF330661-FN20
NSN: 4820-01-357-3558
FSC: 4820 — Valves, Nonpowered
CAGE: 43689 — HUNTINGTON INGALLS INC DIV NEWPORT NEWS SHIPBUILDING (USA)
SPECIFICATIONS
materialNICKEL ALLOY
overall_length4.620 INCHES NOMINAL IN
stem_actuating_end_typeTHREADED EXTERNALLY
largest_outside_diameter0.989 INCHES NOMINAL IN
valve_size_for_which_designed0.250 INCHES IN
valve_type_for_which_designedBALL
NSN4820-01-357-3558
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: DF330661-FN20 · 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 TYPE FOR WHICH DESIGNED: BALL
•
LARGEST OUTSIDE DIAMETER: 0.989 INCHES NOMINAL IN
•
STEM ACTUATING END TYPE: THREADED EXTERNALLY
•
VALVE SIZE FOR WHICH DESIGNED: 0.250 INCHES IN
•
MATERIAL: NICKEL ALLOY
TECHNICAL CHARACTERISTICS
VALVE TYPE FOR WHICH DESIGNEDBALL
LARGEST OUTSIDE DIAMETER0.989 INCHES NOMINAL IN
STEM ACTUATING END TYPETHREADED EXTERNALLY
OVERALL LENGTH4.620 INCHES NOMINAL IN
VALVE SIZE FOR WHICH DESIGNED0.250 INCHES IN
MATERIALNICKEL ALLOY
SUBSTITUTES & CROSS-REFERENCES 3
6408589Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
211054821Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
DF330661Reference 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 DF330661-FN20?
DF330661-FN20 is a ADAPTER ASSEMBLY,VALVE.
What parts can replace DF330661-FN20?
There are 3 known substitutes for DF330661-FN20: 6408589, 211054821, DF330661. Substitute compatibility should be verified for your specific system.
What is the NSN for DF330661-FN20?
DF330661-FN20 is cataloged in the U.S. Government catalog under NSN 4820-01-357-3558. 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.