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6408987 — ADAPTER ASSEMBLY,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

6408987: ADAPTER ASSEMBLY,VALVE.

The ADAPTER ASSEMBLY,VALVE is a the manufacturer industrial component. Key specifications include width: 2.250 INCHES NOMINAL IN, material: PLASTIC OVERALL, port_shape: ROUND, plug_design: CYLINDRICAL, plug_length: 2.930 INCHES NOMINAL IN, seat_radius: 0.280 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-429-0421, 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
6408987
NSN: 4820-01-429-0421
NIINs: 014290421, 014290556, 014291272, 014291273, 014291276, 014292492, 014329230, 014423077
FSC: 4820 — Valves, Nonpowered
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
width2.250 INCHES NOMINAL IN
materialPLASTIC OVERALL
port_shapeROUND
plug_designCYLINDRICAL
plug_length2.930 INCHES NOMINAL IN
seat_radius0.280 INCHES NOMINAL IN
overall_width0.850 INCHES NOMINAL IN
plug_diameter3.380 INCHES NOMINAL IN
port_diameter0.406 INCHES NOMINAL IN
port_quantity4
overall_height0.250 INCHES NOMINAL IN
overall_length4.060 INCHES NOMINAL IN
NSN4820-01-429-0421
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 6408987 · 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
•
BODY OUTSIDE DIAMETER: 1.061 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN
•
BODY INSIDE DIAMETER: 0.563 INCHES NOMINAL IN
•
SEAT RADIUS: 0.280 INCHES NOMINAL IN
•
MATERIAL: PLASTIC OVERALL
•
SEATING SURFACE SHAPE: RADIAL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.250 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER1.061 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN
BODY INSIDE DIAMETER0.563 INCHES NOMINAL IN
SEAT RADIUS0.280 INCHES NOMINAL IN
END ITEM IDENTIFICATIONSEAWOLF CLASS SSN
MATERIALPLASTIC OVERALL
SEATING SURFACE SHAPERADIAL
SUBSTITUTES & CROSS-REFERENCES 3
264378701 FINDReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
2643-787-01 FN A-5Reference document
Same NSN cross-reference
Reference document — Secondary reference
211084951Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 6408987?
6408987 is a ADAPTER ASSEMBLY,VALVE.
What parts can replace 6408987?
There are 3 known substitutes for 6408987: 264378701 FIND, 2643-787-01 FN A-5, 211084951. Substitute compatibility should be verified for your specific system.
What is the NSN for 6408987?
6408987 is cataloged in the U.S. Government catalog under NSN 4820-01-429-0421. 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.