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563-6404328-AY99 — VALVE,VENT

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

563-6404328-AY99: VALVE,VENT.

The VALVE,VENT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, connection_type: FLANGE ALL ENDS, end_item_identification: SEAWOLF CLASS SSN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-443-9807, 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
563-6404328-AY99
NSN: 4820-01-443-9807
FSC: 4820 — Valves, Nonpowered
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL OVERALL
connection_typeFLANGE ALL ENDS
end_item_identificationSEAWOLF CLASS SSN
NSN4820-01-443-9807
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 563-6404328-AY99 · 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
•
CONNECTION TYPE: FLANGE ALL ENDS
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
CONNECTION TYPEFLANGE ALL ENDS
END ITEM IDENTIFICATIONSEAWOLF CLASS SSN
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
211037443Reference document
Same NSN cross-reference
Reference document — Secondary reference
6404328Reference 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 563-6404328-AY99?
563-6404328-AY99 is a VALVE,VENT.
What parts can replace 563-6404328-AY99?
There are 2 known substitutes for 563-6404328-AY99: 211037443, 6404328. Substitute compatibility should be verified for your specific system.
What is the NSN for 563-6404328-AY99?
563-6404328-AY99 is cataloged in the U.S. Government catalog under NSN 4820-01-443-9807. 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.