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20571-F — DISK,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

20571-F: DISK,VALVE.

The DISK,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL, overall_height: 6.500 INCHES NOMINAL IN, overall_length: 4.188 INCHES NOMINAL IN, shoulder_width: 1.608 INCHES NOMINAL IN, aa_end_diameter: 2.188 INCHES NOMINAL IN, shoulder_height: 0.625 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-234-4984, 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
NSN: 4820-01-234-4984
NIINs: 012344984, 012344994
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
overall_length4.188 INCHES NOMINAL IN
shoulder_width1.608 INCHES NOMINAL IN
aa_end_diameter2.188 INCHES NOMINAL IN
shoulder_height0.625 INCHES NOMINAL IN
outside_diameter3.125 INCHES NOMINAL IN
style_designatorPLAIN-SHOULDERED
bb_end_shank_diameter0.484 INCHES NOMINAL IN
major_diameter_length0.438 INCHES NOMINAL IN
shoulder_first_fillet_radius0.125 INCHES NOMINAL IN
length_from_aa_end_to_largest_diameter_face0.500 INCHES NOMINAL IN
NSN4820-01-234-4984
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 20571-F · 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
•
MAJOR DIAMETER LENGTH: 0.438 INCHES NOMINAL IN
•
BB END SHANK DIAMETER: 0.484 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN-SHOULDERED
•
OUTSIDE DIAMETER: 3.125 INCHES NOMINAL IN
•
LENGTH FROM AA END TO LARGEST DIAMETER FACE: 0.500 INCHES NOMINAL IN
•
AA END DIAMETER: 2.188 INCHES NOMINAL IN
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
MAJOR DIAMETER LENGTH0.438 INCHES NOMINAL IN
BB END SHANK DIAMETER0.484 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN-SHOULDERED
OVERALL LENGTH4.188 INCHES NOMINAL IN
OUTSIDE DIAMETER3.125 INCHES NOMINAL IN
LENGTH FROM AA END TO LARGEST DIAMETER FACE0.500 INCHES NOMINAL IN
AA END DIAMETER2.188 INCHES NOMINAL IN
MATERIALSTEEL
SHOULDER FIRST FILLET RADIUS0.125 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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?
20571-F is a DISK,VALVE.
What is the NSN for 20571-F?
20571-F is cataloged in the U.S. Government catalog under NSN 4820-01-234-4984. 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.