NSN 4820-00-620-8495 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-620-8495. Manufacturer of record part number: 18424.
Flange Seat to Disk End Height: 0.287 INCHES NOMINAL IN
Outside Diameter: 0.625 INCHES NOMINAL IN
Style Designator: POPPET
Tip Diameter: 0.625 INCHES NOMINAL IN
Seat Angle: 45.0 DEGREES NOMINAL
Under Flange Height: 2.790 INCHES NOMINAL IN
Identification
NSN: 4820-00-620-8495
NIIN: 006208495
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 18424
Manufacturer: Leslie Controls, Inc. Dba Leslie Controls Inc
General Description
The Disk,valve, cataloged under National Stock Number 4820-00-620-8495, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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.
Technical Specifications
Parameter
Value
NSN
4820-00-620-8495
Primary Part Number
18424
Item Name
Disk,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Leslie Controls, Inc. Dba Leslie Controls Inc
Status
ACTIVE
Shank Diameter
0.500 INCHES NOMINAL IN
Flange Seat to Disk End Height
0.287 INCHES NOMINAL IN
Outside Diameter
0.625 INCHES NOMINAL IN
Style Designator
POPPET
Tip Diameter
0.625 INCHES NOMINAL IN
Seat Angle
45.0 DEGREES NOMINAL
Under Flange Height
2.790 INCHES NOMINAL IN
Material
STEEL
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.
5945-00-980-497218-424POSSIBLE MATCH
RELAY,ELECTROMAGNETIC
Possible match (shared part number)Almco, Inc
5306-01-553-134518424POSSIBLE MATCH
BOLT,MACHINE
Possible match (shared part number)Fastenal Company Dba Fastenal Co
5999-01-567-631318-424POSSIBLE MATCH
CLIP,ELECTRICAL
Possible match (shared part number)Power Connector Llc
6510-01-587-8700NON253590POSSIBLE MATCH
GAUZE,PETROLATUM
Possible match (shared part number)Medline Industries, Lp
1005-01-713-926418424POSSIBLE MATCH
STOCK EXTENSION,GUN
Possible match (shared part number)Barrett Firearms Manufacturing, Inc. Dba Barrett Firearms Manufacturing Inc
Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Reference documents
Reference
Meaning
4728N1
D/9Drawing number reference only
Leslie Controls, Inc. Dba Leslie Controls Inc
Related Parts
5945-00-980-4972POSSIBLE MATCH
RELAY,ELECTROMAGNETIC
18-424
5306-01-553-1345POSSIBLE MATCH
BOLT,MACHINE
18424
5999-01-567-6313POSSIBLE MATCH
CLIP,ELECTRICAL
18-424
6510-01-587-8700POSSIBLE MATCH
GAUZE,PETROLATUM
NON253590
1005-01-713-9264POSSIBLE MATCH
STOCK EXTENSION,GUN
18424
Frequently Asked Questions
What is NSN 4820-00-620-8495?
NSN 4820-00-620-8495 is a Disk,valve, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-620-8495?
NSN 4820-00-620-8495 has 2 manufacturer part numbers on file: 18424 (Lineta Engineering Und Handelsgesell-Schaft Mbh), 18424 (Leslie Controls, Inc. Dba Leslie Controls Inc).
What NSN replaces 4820-00-620-8495?
5 possible matches (shared part number, not a government interchangeability claim): 5945-00-980-4972, 5306-01-553-1345, 5999-01-567-6313. Verify interchangeability with system specifications before substitution.
What are the specifications of 18424?
Key specifications for 18424: Shank Diameter: 0.500 INCHES NOMINAL IN; Flange Seat to Disk End Height: 0.287 INCHES NOMINAL IN; Overall Height: 4.315 INCHES NOMINAL IN; Outside Diameter: 0.625 INCHES NOMINAL IN. 8 specifications are documented in the U.S. Government catalog.
Is NSN 4820-00-620-8495 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.