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264378505-A-4 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

264378505-A-4: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include end_item_identification: VALVE,BALL;NAVAL SEA SYSTEMS COMMAND. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-378-4872, 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
264378505-A-4
NSN: 4820-01-378-4872
FSC: 4820 — Valves, Nonpowered
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
end_item_identificationVALVE,BALL;NAVAL SEA SYSTEMS COMMAND
NSN4820-01-378-4872
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 264378505-A-4 · 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
TECHNICAL CHARACTERISTICS
END ITEM IDENTIFICATIONVALVE,BALL;NAVAL SEA SYSTEMS COMMAND
SUBSTITUTES & CROSS-REFERENCES 2
6408988Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
556-6408988-B-4Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 264378505-A-4?
264378505-A-4 is a SEAT,VALVE.
What parts can replace 264378505-A-4?
There are 2 known substitutes for 264378505-A-4: 6408988, 556-6408988-B-4. Substitute compatibility should be verified for your specific system.
What is the NSN for 264378505-A-4?
264378505-A-4 is cataloged in the U.S. Government catalog under NSN 4820-01-378-4872. 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.