The Diaphragm,actuator Valve,special, cataloged under National Stock Number 4820-00-585-9301, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Walchem Corp. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-585-9301 |
| Primary Part Number | 938-W |
| Item Name | Diaphragm,actuator Valve,special |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Walchem Corp |
| Status | ACTIVE |
| Shank Diameter | 0.750 INCHES NOMINAL IN |
| Outside Diameter | 0.300 INCHES NOMINAL IN |
| Style Designator | SPECIAL SHAPED |
| Bolt Hole Quantity | 4 |
| Bolt Circle Diameter | 2.625 INCHES NOMINAL IN |
| Material | PLASTIC AND RUBBER SYNTHETIC |
| Hole Diameter | 0.215 INCHES NOMINAL IN |
| 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 |
|---|---|
| 938-W PRIMARY | Walchem Corp (USA) |
| Reference | Meaning |
|---|---|
| 472 | 5/9 Secondary reference Walchem Corp |
NSN 4820-00-585-9301 is a Diaphragm,actuator Valve,special, manufactured by Walchem Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-585-9301 has 1 manufacturer part number on file: 938-W (Walchem Corp).
Key specifications for 938-W: Shank Diameter: 0.750 INCHES NOMINAL IN; Overall Height: 0.548 INCHES NOMINAL IN; Outside Diameter: 0.300 INCHES NOMINAL IN; Style Designator: SPECIAL SHAPED. 7 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.