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20-03329 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

20-03329: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYAMIDE NYLON OVERALL, seat_radius: 0.250 INCHES NOMINAL IN, overall_height: 0.406 INCHES NOMINAL IN, style_designator: PLAIN, body_inside_diameter: 2.500 INCHES NOMINAL IN, taper_minor_diameter: 0.850 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-445-8614, 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
20-03329
NSN: 4820-00-445-8614
FSC: 4820 — Valves, Nonpowered
CAGE: 03670 — TYCO FIRE PRODUCTS LP (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON OVERALL
seat_radius0.250 INCHES NOMINAL IN
overall_height0.406 INCHES NOMINAL IN
style_designatorPLAIN
body_inside_diameter2.500 INCHES NOMINAL IN
taper_minor_diameter0.850 INCHES NOMINAL IN
body_outside_diameter3.500 INCHES NOMINAL IN
seating_surface_shapeRADIAL
NSN4820-00-445-8614
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 20-03329 · 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
•
BODY OUTSIDE DIAMETER: 3.500 INCHES NOMINAL IN
•
TAPER MINOR DIAMETER: 0.850 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN
•
BODY INSIDE DIAMETER: 2.500 INCHES NOMINAL IN
•
SEAT RADIUS: 0.250 INCHES NOMINAL IN
•
MATERIAL: PLASTIC POLYAMIDE NYLON OVERALL
•
SEATING SURFACE SHAPE: RADIAL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.406 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER3.500 INCHES NOMINAL IN
TAPER MINOR DIAMETER0.850 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN
BODY INSIDE DIAMETER2.500 INCHES NOMINAL IN
SEAT RADIUS0.250 INCHES NOMINAL IN
MATERIALPLASTIC POLYAMIDE NYLON OVERALL
SEATING SURFACE SHAPERADIAL
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 2
V3283PC4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
V3329Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 20-03329?
20-03329 is a SEAT,VALVE.
What parts can replace 20-03329?
There are 2 known substitutes for 20-03329: V3283PC4, V3329. Substitute compatibility should be verified for your specific system.
What is the NSN for 20-03329?
20-03329 is cataloged in the U.S. Government catalog under NSN 4820-00-445-8614. 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.