The Diaphragm,valve,flat, cataloged under National Stock Number 4820-00-885-3783, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is O. C. Keckley Company. Government technical data includes 8 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 | 4820-00-885-3783 |
| Primary Part Number | A58399 |
| Item Name | Diaphragm,valve,flat |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | O. C. Keckley Company |
| Status | ACTIVE |
| Outside Diameter | 11.375 INCHES NOMINAL IN |
| Style Designator | FLAT |
| Material Thickness | 0.130 INCHES NOMINAL IN |
| Bolt Hole Quantity | 16 |
| Bolt Circle Diameter | 10.000 INCHES NOMINAL IN |
| Center Hole Diameter | 0.375 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC |
| Hole Diameter | 0.750 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 |
|---|---|
| A58399 PRIMARY | O. C. Keckley Company (USA) |
NSN 4820-00-885-3783 is a Diaphragm,valve,flat, manufactured by O. C. Keckley Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-885-3783 has 1 manufacturer part number on file: A58399 (O. C. Keckley Company).
Key specifications for A58399: Outside Diameter: 11.375 INCHES NOMINAL IN; Style Designator: FLAT; Material Thickness: 0.130 INCHES NOMINAL IN; Bolt Hole Quantity: 16. 8 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.