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MAI-58A18PC21 — DISK,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

MAI-58A18PC21: DISK,VALVE.

The DISK,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL, seat_angle: 45.0 DEGREES NOMINAL, thread_class: 2B, overall_height: 9.125 INCHES NOMINAL IN, outside_diameter: 7.140 INCHES NOMINAL IN, style_designator: PLUG. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-369-9882, 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
MAI-58A18PC21
NSN: 4820-00-369-9882
FSC: 4820 — Valves, Nonpowered
CAGE: 55084 — ARGUS MFG CORP (USA)
SPECIFICATIONS
materialSTEEL
seat_angle45.0 DEGREES NOMINAL
thread_class2B
overall_height9.125 INCHES NOMINAL IN
outside_diameter7.140 INCHES NOMINAL IN
style_designatorPLUG
nominal_thread_size2.875 INCHES IN
thread_quantity_per_inch12
thread_series_designatorUN
NSN4820-00-369-9882
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: MAI-58A18PC21 · 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: 7.140 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLUG
•
SEAT ANGLE: 45.0 DEGREES NOMINAL
•
NOMINAL THREAD SIZE: 2.875 INCHES IN
•
THREAD CLASS: 2B
•
THREAD QUANTITY PER INCH: 12
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT9.125 INCHES NOMINAL IN
OUTSIDE DIAMETER7.140 INCHES NOMINAL IN
STYLE DESIGNATORPLUG
SEAT ANGLE45.0 DEGREES NOMINAL
NOMINAL THREAD SIZE2.875 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 1
58A18-21Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 MAI-58A18PC21?
MAI-58A18PC21 is a DISK,VALVE.
What parts can replace MAI-58A18PC21?
There is 1 known substitute for MAI-58A18PC21: 58A18-21. Substitute compatibility should be verified for your specific system.
What is the NSN for MAI-58A18PC21?
MAI-58A18PC21 is cataloged in the U.S. Government catalog under NSN 4820-00-369-9882. 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.