The Diaphragm,actuator Valve,special, cataloged under National Stock Number 4820-00-731-6916, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-731-6916 |
| Item Name | Diaphragm,actuator Valve,special |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Outside Diameter | 4.320 INCHES NOMINAL IN |
| Taper Minor Diameter | 2.125 INCHES NOMINAL IN |
| Style Designator | SPECIAL SHAPED |
| Taper Major Diameter | 3.000 INCHES NOMINAL IN |
| Material Thickness | 0.084 INCHES NOMINAL IN |
| Bolt Hole Quantity | 6 |
| Bolt Circle Diameter | 3.798 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC |
| Hole Diameter | 0.212 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 |
| Reference | Meaning |
|---|---|
| B1257V | 3/9 Design control — primary reference U.S. Government activity |
| B1257V | C/1 Advisory reference — outside the item-of-supply concept Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division |
| 540022PC2 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-00-731-6916 is a Diaphragm,actuator Valve,special, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-023-0672. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-731-6916: Overall Height: 0.457 INCHES NOMINAL IN; Outside Diameter: 4.320 INCHES NOMINAL IN; Taper Minor Diameter: 2.125 INCHES NOMINAL IN; Style Designator: SPECIAL SHAPED. 9 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.