The Valve,butterfly, cataloged under National Stock Number 4820-01-588-7690, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Betts Industries, Inc.. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-588-7690 |
| Primary Part Number | WET-R-DRI WD401ALVB162 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Betts Industries, Inc. |
| Status | ACTIVE |
| Valve Size | 4.000 INCHES IN |
| Valve Operation Method | MANUAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| WET-R-DRI WD401ALVB162 PRIMARY | Betts Industries, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 6201044 | D/9 Drawing number reference only U.S. Government activity |
NSN 4820-01-588-7690 is a Valve,butterfly, manufactured by Betts Industries, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-588-7690 has 1 manufacturer part number on file: WET-R-DRI WD401ALVB162 (Betts Industries, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-591-4226. Verify interchangeability with system specifications before substitution.
Key specifications for WET-R-DRI WD401ALVB162: Valve Size: 4.000 INCHES IN; Special Features: HEIGTH-8 11/16; LENGTH 10 1/16; THICKNESS 1 1/8; Part Name Assigned by Controlling Agency: VLV-BFLY 4 INCH DETENT, AL SS ECOAT IN; End Item Identification: 3825-01-577-2713; DISTRIBUTOR,WATER,TANK TYPE. 2 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.