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8204-005-031-S — DISK,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

8204-005-031-S: DISK,VALVE.

The DISK,VALVE is a the manufacturer industrial component. Key specifications include thread_class: 2A A, shank_diameter: 0.990 INCHES NOMINAL IN, outside_diameter: 0.375 INCHES NOMINAL IN, special_features: USED ON SWING CHECK VALVE, nominal_thread_size: 0.250 INCHES IN, thread_series_designator: UNIFIED NATIONAL COARSE (UNC). This part is cataloged in the U.S.

Government catalog under NSN 4820-01-470-2020, 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
8204-005-031-S
NSN: 4820-01-470-2020
FSC: 4820 — Valves, Nonpowered
CAGE: 57574 — VELAN VALVE CORP. (USA)
SPECIFICATIONS
thread_class2A A
shank_diameter0.990 INCHES NOMINAL IN
outside_diameter0.375 INCHES NOMINAL IN
special_featuresUSED ON SWING CHECK VALVE
nominal_thread_size0.250 INCHES IN
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
flange_seat_to_disk_end_height0.681 INCHES NOMINAL IN
NSN4820-01-470-2020
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 8204-005-031-S · 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: 0.990 INCHES NOMINAL IN
•
FLANGE SEAT TO DISK END HEIGHT: 0.681 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 0.375 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
THREAD CLASS: 2A A
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.990 INCHES NOMINAL IN
FLANGE SEAT TO DISK END HEIGHT0.681 INCHES NOMINAL IN
OUTSIDE DIAMETER0.375 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.250 INCHES IN
SPECIAL FEATURESUSED ON SWING CHECK VALVE
THREAD CLASS2A A
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
SUBSTITUTES & CROSS-REFERENCES 2
7492-737 ITEM NO.8Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
7492-737Reference 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 8204-005-031-S?
8204-005-031-S is a DISK,VALVE.
What parts can replace 8204-005-031-S?
There are 2 known substitutes for 8204-005-031-S: 7492-737 ITEM NO.8, 7492-737. Substitute compatibility should be verified for your specific system.
What is the NSN for 8204-005-031-S?
8204-005-031-S is cataloged in the U.S. Government catalog under NSN 4820-01-470-2020. 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.