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20571-F PART 4 — DISK,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

20571-F PART 4: DISK,VALVE.

The DISK,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL, overall_height: 6.500 INCHES NOMINAL IN, shoulder_width: 1.608 INCHES NOMINAL IN, shoulder_height: 0.625 INCHES NOMINAL IN, outside_diameter: 4.140 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-234-4994, 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
20571-F PART 4
NSN: 4820-01-234-4994
FSC: 4820 — Valves, Nonpowered
CAGE: 04537 — ATWOOD & MORRILL CO., INC. DBA WEIR VALVES AND CONTROLS USA (USA)
SPECIFICATIONS
materialSTEEL
overall_height6.500 INCHES NOMINAL IN
shoulder_width1.608 INCHES NOMINAL IN
shoulder_height0.625 INCHES NOMINAL IN
outside_diameter4.140 INCHES NOMINAL IN
NSN4820-01-234-4994
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 20571-F PART 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
KEY FEATURES
•
SHOULDER WIDTH: 1.608 INCHES NOMINAL IN
•
SHOULDER HEIGHT: 0.625 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 4.140 INCHES NOMINAL IN
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT6.500 INCHES NOMINAL IN
SHOULDER WIDTH1.608 INCHES NOMINAL IN
SHOULDER HEIGHT0.625 INCHES NOMINAL IN
OUTSIDE DIAMETER4.140 INCHES NOMINAL IN
MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 1
20571-FReference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 20571-F PART 4?
20571-F PART 4 is a DISK,VALVE.
What parts can replace 20571-F PART 4?
There is 1 known substitute for 20571-F PART 4: 20571-F. Substitute compatibility should be verified for your specific system.
What is the NSN for 20571-F PART 4?
20571-F PART 4 is cataloged in the U.S. Government catalog under NSN 4820-01-234-4994. 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.