The Diaphragm,actuator Valve,special, cataloged under National Stock Number 4820-00-678-0306, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives. Government technical data includes 10 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-678-0306 |
| Primary Part Number | 4541-4-G |
| Item Name | Diaphragm,actuator Valve,special |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives |
| Status | ACTIVE |
| Bead Diameter | 1.500 INCHES NOMINAL IN |
| Outside Diameter | 3.375 INCHES NOMINAL IN |
| Supplementary Features | MATERIAL: RUBBER, CHLOROPRENE IMPREGNATED FABRIC REINFORCED |
| Style Designator | SPECIAL SHAPED |
| Material Thickness | 0.016 INCHES NOMINAL IN |
| Bolt Hole Quantity | 12 |
| Bolt Circle Diameter | 2.812 INCHES NOMINAL IN |
| Center Hole Diameter | 0.246 INCHES NOMINAL IN |
| Material | RUBBER CHLOROPRENE CLASS CR |
| Hole Diameter | 0.281 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 |
|---|---|
| 4541-4-G PRIMARY | Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives (USA) |
NSN 4820-00-678-0306 is a Diaphragm,actuator Valve,special, manufactured by Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-678-0306 has 1 manufacturer part number on file: 4541-4-G (Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives).
Key specifications for 4541-4-G: Bead Diameter: 1.500 INCHES NOMINAL IN; Outside Diameter: 3.375 INCHES NOMINAL IN; Supplementary Features: MATERIAL: RUBBER, CHLOROPRENE IMPREGNATED FABRIC REINFORCED; Style Designator: SPECIAL SHAPED. 10 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.