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58A20-21 — DISK,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

58A20-21: DISK,VALVE.

The DISK,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL, thread_class: 2B, overall_height: 12.312 INCHES NOMINAL IN, outside_diameter: 3.750 INCHES NOMINAL IN, nominal_thread_size: 2.500 INCHES IN, thread_quantity_per_inch: 12. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-369-9883, 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
58A20-21
NSN: 4820-00-369-9883
FSC: 4820 — Valves, Nonpowered
CAGE: 53553 — AMETEK INC SCHUTTE AND KOERTING DIV (USA)
SPECIFICATIONS
materialSTEEL
thread_class2B
overall_height12.312 INCHES NOMINAL IN
outside_diameter3.750 INCHES NOMINAL IN
nominal_thread_size2.500 INCHES IN
thread_quantity_per_inch12
thread_series_designatorUN
NSN4820-00-369-9883
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 58A20-21 · 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
•
OUTSIDE DIAMETER: 3.750 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 2.500 INCHES IN
•
THREAD CLASS: 2B
•
THREAD QUANTITY PER INCH: 12
•
MATERIAL: STEEL
•
THREAD SERIES DESIGNATOR: UN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT12.312 INCHES NOMINAL IN
OUTSIDE DIAMETER3.750 INCHES NOMINAL IN
NOMINAL THREAD SIZE2.500 INCHES IN
THREAD CLASS2B
THREAD QUANTITY PER INCH12
MATERIALSTEEL
THREAD SERIES DESIGNATORUN
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 58A20-21?
58A20-21 is a DISK,VALVE.
What is the NSN for 58A20-21?
58A20-21 is cataloged in the U.S. Government catalog under NSN 4820-00-369-9883. 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.