The Disk,valve, cataloged under National Stock Number 4820-00-983-6519, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Griswold Pump Co. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-983-6519 |
| Primary Part Number | 0020787 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Griswold Pump Co |
| Status | ACTIVE |
| Outside Diameter | 1.625 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Inside Diameter | 0.375 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC |
| 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 |
|---|---|
| 0020787 PRIMARY | Griswold Pump Co (USA) |
| Reference | Meaning |
|---|---|
| 0020787 | 5/9 Secondary reference Crane Co Dba Crane-Deming Pumps Division Div Deming Pumps |
NSN 4820-00-983-6519 is a Disk,valve, manufactured by Griswold Pump Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-983-6519 has 1 manufacturer part number on file: 0020787 (Griswold Pump Co).
Key specifications for 0020787: Overall Height: 0.187 INCHES NOMINAL IN; Outside Diameter: 1.625 INCHES NOMINAL IN; Style Designator: PLAIN; Inside Diameter: 0.375 INCHES NOMINAL IN. 4 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.