NSN 4820-01-284-4272 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-284-4272. Manufacturer of record part number: 9019-029.
Flange Seat to Disk End Height: 1.708 INCHES NOMINAL IN
Flange Diameter: 4.172 INCHES MINIMUM AND 4.187 INCHES MAXIMUM IN
FSC Application Data: VALVE GATE
Body Outside Diameter: 4.062 INCHES NOMINAL IN
Style Designator: PLAIN FLANGED
Material Document and Classification: ASTM A217,GR WC9 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A182 ASSN STD 1ST MATERIAL RESPONSE OVERALL
Under Flange Height: 0.250 INCHES NOMINAL IN
Identification
NSN: 4820-01-284-4272
NIIN: 012844272
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 9019-029
Manufacturer: Velan Valve Corp.
General Description
The Seat,valve, cataloged under National Stock Number 4820-01-284-4272, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Velan Valve Corp.. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-284-4272
Primary Part Number
9019-029
Item Name
Seat,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Velan Valve Corp.
Status
ACTIVE
Flange Seat to Disk End Height
1.708 INCHES NOMINAL IN
Flange Diameter
4.172 INCHES MINIMUM AND 4.187 INCHES MAXIMUM IN
FSC Application Data
VALVE GATE
Body Outside Diameter
4.062 INCHES NOMINAL IN
Style Designator
PLAIN FLANGED
Material Document and Classification
ASTM A217,GR WC9 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A182 ASSN STD 1ST MATERIAL RESPONSE OVERALL
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-284-4272?
NSN 4820-01-284-4272 is a Seat,valve, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-284-4272?
NSN 4820-01-284-4272 has 2 manufacturer part numbers on file: 9019-029 (Velan Valve Corp.), 9015-007-178 (Velan Valve Corp.).
What are the specifications of 9019-029?
Key specifications for 9019-029: Flange Seat to Disk End Height: 1.708 INCHES NOMINAL IN; Flange Diameter: 4.172 INCHES MINIMUM AND 4.187 INCHES MAXIMUM IN; FSC Application Data: VALVE GATE; Body Outside Diameter: 4.062 INCHES NOMINAL IN. 8 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-284-4272 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.