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30A20 — DIAPHRAGM,VALVE,FLAT

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

30A20: DIAPHRAGM,VALVE,FLAT.

The DIAPHRAGM,VALVE,FLAT is a the manufacturer industrial component. Key specifications include material: RUBBER, hole_diameter: 0.266 INCHES NOMINAL IN, overall_width: 2.062 INCHES NOMINAL IN, overall_length: 2.062 INCHES NOMINAL IN, style_designator: FLAT, material_thickness: 0.074 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-460-6299, 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
30A20
NSN: 4820-00-460-6299
FSC: 4820 — Valves, Nonpowered
CAGE: 79227 — WATTS REGULATOR COMPANY (USA)
SPECIFICATIONS
materialRUBBER
hole_diameter0.266 INCHES NOMINAL IN
overall_width2.062 INCHES NOMINAL IN
overall_length2.062 INCHES NOMINAL IN
style_designatorFLAT
bolt_hole_quantity4
material_thickness0.074 INCHES NOMINAL IN
center_hole_diameter0.250 INCHES NOMINAL IN
outside_corner_radius0.219 INCHES NOMINAL IN
NSN4820-00-460-6299
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 30A20 · 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
•
STYLE DESIGNATOR: FLAT
•
MATERIAL THICKNESS: 0.074 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 4
•
CENTER HOLE DIAMETER: 0.250 INCHES NOMINAL IN
•
OUTSIDE CORNER RADIUS: 0.219 INCHES NOMINAL IN
•
MATERIAL: RUBBER
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORFLAT
OVERALL LENGTH2.062 INCHES NOMINAL IN
OVERALL WIDTH2.062 INCHES NOMINAL IN
MATERIAL THICKNESS0.074 INCHES NOMINAL IN
BOLT HOLE QUANTITY4
CENTER HOLE DIAMETER0.250 INCHES NOMINAL IN
OUTSIDE CORNER RADIUS0.219 INCHES NOMINAL IN
MATERIALRUBBER
HOLE DIAMETER0.266 INCHES NOMINAL IN
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
20Reference document
2 x Intel Xeon E5-2650 v4 2.2GHz,30M Cache,9.60GT/s QPI,Turbo,HT,12C/24T (105W) Max Mem 2400MHz
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 30A20?
30A20 is a DIAPHRAGM,VALVE,FLAT.
What parts can replace 30A20?
There is 1 known substitute for 30A20: 20. Substitute compatibility should be verified for your specific system.
What is the NSN for 30A20?
30A20 is cataloged in the U.S. Government catalog under NSN 4820-00-460-6299. 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.