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FV21-343 — DISK,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

FV21-343: DISK,VALVE.

The DISK,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OR STEEL CORROSION RESISTING, seat_angle: 60.0 DEGREES NOMINAL, overall_height: 1.144 INCHES MINIMUM AND 1.160 INCHES MAXIMUM IN, shank_diameter: 0.484 INCHES NOMINAL IN, flange_diameter: 0.100 INCHES NOMINAL IN, special_features: DISK OUTER PERIPHERY PASSIVATED. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-533-8254, 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
FV21-343
NSN: 4820-00-533-8254
FSC: 4820 — Valves, Nonpowered
CAGE: 04845 — AUTOMATIC SWITCH COMPANY DBA ASCO (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OR STEEL CORROSION RESISTING
seat_angle60.0 DEGREES NOMINAL
overall_height1.144 INCHES MINIMUM AND 1.160 INCHES MAXIMUM IN
shank_diameter0.484 INCHES NOMINAL IN
flange_diameter0.100 INCHES NOMINAL IN
special_featuresDISK OUTER PERIPHERY PASSIVATED
style_designatorPOPPET
material_document_and_classificationQQ-A-763, CLASS 303 FED SPEC SINGLE MATERIAL RESPONSE
NSN4820-00-533-8254
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: FV21-343 · 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
•
SHANK DIAMETER: 0.484 INCHES NOMINAL IN
•
FLANGE DIAMETER: 0.100 INCHES NOMINAL IN
•
STYLE DESIGNATOR: POPPET
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-763, CLASS 303 FED SPEC SINGLE MATERIAL RESPONSE
•
SEAT ANGLE: 60.0 DEGREES NOMINAL
•
MATERIAL: STEEL COMP 303 OR STEEL CORROSION RESISTING
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.484 INCHES NOMINAL IN
FLANGE DIAMETER0.100 INCHES NOMINAL IN
OVERALL HEIGHT1.144 INCHES MINIMUM AND 1.160 INCHES MAXIMUM IN
STYLE DESIGNATORPOPPET
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-763, CLASS 303 FED SPEC SINGLE MATERIAL RESPONSE
SEAT ANGLE60.0 DEGREES NOMINAL
SPECIAL FEATURESDISK OUTER PERIPHERY PASSIVATED
MATERIALSTEEL COMP 303 OR STEEL CORROSION RESISTING
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 FV21-343?
FV21-343 is a DISK,VALVE.
What is the NSN for FV21-343?
FV21-343 is cataloged in the U.S. Government catalog under NSN 4820-00-533-8254. 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.