The Piston,valve, cataloged under National Stock Number 4820-01-510-9257, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-510-9257 |
| Item Name | Piston,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| 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 |
|---|---|
| A107650-101-11 ITEM 1 | 5/9 Secondary reference General Dynamics Mission Systems, Inc. |
| A107651-101-11 | 5/9 Secondary reference General Dynamics Adv Info Sys |
| A107651-101-11 | C/1 Advisory reference — outside the item-of-supply concept General Dynamics Mission Systems, Inc. |
| A107650-101-11 ITEM 1 | C/1 Advisory reference — outside the item-of-supply concept General Dynamics Mission Systems, Inc. |
| A107651-101-11 | 3/9 Design control — primary reference General Dynamics Mission Systems, Inc. |
NSN 4820-01-510-9257 is a Piston,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-510-9257: End Item Identification: GUN ASSY, GREASE; WSD: SEAWOLF CLASS SSN. 0 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.