The Diaphragm,valve,flat, cataloged under National Stock Number 4820-01-229-4260, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-229-4260 |
| Item Name | Diaphragm,valve,flat |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Pressure Rating | 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Style Designator | FLAT |
| Material Thickness | 0.027 INCHES NOMINAL IN |
| Bolt Hole Quantity | 5 |
| Center to Center Distance Between Bolt Holes Along Length | 1.220 INCHES NOMINAL IN |
| Center to Center Distance Between Bolt Holes Along Width | 1.220 INCHES NOMINAL IN |
| Center Hole Diameter | 0.188 INCHES NOMINAL IN |
| Media for Which Designed | WATER |
| Outside Corner Radius | 0.142 INCHES NOMINAL IN |
| Material | RUBBER |
| Hole Diameter | 0.164 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 |
|---|---|
| S4824-3000849 | D/9 Drawing number reference only U.S. Government activity |
| 246-340 | 3/2 Design control — primary reference U.S. Government activity |
| PLR-N-492 | D/9 Drawing number reference only U.S. Government activity |
| S4824-3000849 PIECE 7 | 5/2 Secondary reference U.S. Government activity |
| PLR-N-492 PIECE 7 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-229-4260 is a Diaphragm,valve,flat, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-229-4260: Pressure Rating: 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Style Designator: FLAT; Overall Length: 1.500 INCHES NOMINAL IN; Overall Width: 1.500 INCHES NOMINAL IN. 11 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.