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1021-501H — DISK,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

1021-501H: DISK,VALVE.

The DISK,VALVE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 400, valve_size: 4.000 INCHES IN, flange_shape: ROUND WITH HOLES ALL ENDS, hole_diameter: 0.8125 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, connection_type: FLANGE ALL ENDS, outside_diameter: 14.0625 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-523-6748, 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
1021-501H
NSN: 4820-01-523-6748
NIINs: 015236748, 015240299, 015243488
FSC: 4820 — Valves, Nonpowered
CAGE: 76364 — MILWAUKEE VALVE CO, INC DIV MILWAUKEE VALVE COMPANY, LLC (USA)
SPECIFICATIONS
materialNICKEL ALLOY 400
valve_size4.000 INCHES IN
flange_shapeROUND WITH HOLES ALL ENDS
hole_diameter0.8125 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
connection_typeFLANGE ALL ENDS
outside_diameter14.0625 INCHES NOMINAL IN
special_featuresASTM A494 GR.M30C.
style_designatorSTRAIGHT THRU
aperture_diameter10.0625 INCHES NOMINAL IN
bolt_hole_quantity8 ALL ENDS
flange_face_designPLAIN ALL ENDS
operating_pressure100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
NSN4820-01-523-6748
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1021-501H · 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
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 1021-501H?
1021-501H is a DISK,VALVE.
What is the NSN for 1021-501H?
1021-501H is cataloged in the U.S. Government catalog under NSN 4820-01-523-6748. 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.