NSN 4820-01-423-7602 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-423-7602. Manufacturer of record part number: 83309-37 3IN ITEM 15.
The Seat,valve, cataloged under National Stock Number 4820-01-423-7602, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Velan Valve Corp.. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Catalog Facts
Item Name
Seat,valve
FSC / FSG
4820 — Valves, Nonpowered (FSG 48)
Manufacturers
Velan Valve Corp. (CAGE 57574)
Technical Specifications
Parameter
Value
NSN
4820-01-423-7602
Primary Part Number
83309-37 3IN ITEM 15
Item Name
Seat,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Velan Valve Corp.
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-423-764883309-37 3IN ITEM 3POSSIBLE MATCH
DISK,VALVE
Possible match (shared part number)Velan Valve Corp.
4820-01-423-780883309-37 3IN ITEM 8POSSIBLE MATCH
GLAND BUSHING,VALVE
Possible match (shared part number)Velan Valve Corp.
4820-01-423-781483309-37 3IN ITEM 6POSSIBLE MATCH
SLEEVE,VALVE,GATE
Possible match (shared part number)Velan Valve Corp.
4820-01-432-93068543-009-002SPOSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Velan Valve Corp.
4820-01-465-526683309-37 3IN PC11POSSIBLE MATCH
FLANGE,GLAND,VALVE
Possible match (shared part number)Velan Valve Corp.
NSN 4820-01-423-7602 is a Seat,valve, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-423-7602?
NSN 4820-01-423-7602 has 1 manufacturer part number on file: 83309-37 3IN ITEM 15 (Velan Valve Corp.).
What NSN replaces 4820-01-423-7602?
5 possible matches (shared part number, not a government interchangeability claim): 4820-01-423-7648, 4820-01-423-7808, 4820-01-423-7814. Verify interchangeability with system specifications before substitution.
Is NSN 4820-01-423-7602 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.