The Diaphragm,actuator Valve,special, cataloged under National Stock Number 4820-01-187-1479, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Grove Valve Operations. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-187-1479 |
| Primary Part Number | 142-20002-2 |
| Item Name | Diaphragm,actuator Valve,special |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Grove Valve Operations |
| Status | ACTIVE |
| Pressure Rating | 6000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Bead Diameter | 0.875 INCHES NOMINAL IN |
| Outside Diameter | 2.000 INCHES NOMINAL IN |
| Style Designator | SPECIAL SHAPED |
| Material Document and Classification | MIL-S-7720 MIL SPEC SINGLE MATERIAL RESPONSE |
| Material Thickness | 0.094 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC AND STEEL COMP 303 |
| 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 |
|---|---|
| 142-20002-2 PRIMARY | Grove Valve Operations (USA) |
| N-846A PIECE 10 | Grove Valve Operations (USA) |
| Reference | Meaning |
|---|---|
| N-846A | D/9 Drawing number reference only Grove Valve Operations |
NSN 4820-01-187-1479 is a Diaphragm,actuator Valve,special, manufactured by Grove Valve Operations, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-187-1479 has 2 manufacturer part numbers on file: 142-20002-2 (Grove Valve Operations), N-846A PIECE 10 (Grove Valve Operations).
Key specifications for 142-20002-2: Pressure Rating: 6000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Bead Diameter: 0.875 INCHES NOMINAL IN; Outside Diameter: 2.000 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.