The Valve,safety Relief, cataloged under National Stock Number 4820-01-689-2683, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Eaton Corp Hydraulics Div. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Eaton Corp Hydraulics Div (CAGE 9G527) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-689-2683 |
| Primary Part Number | 1GR155-P16T-2SV |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Eaton Corp Hydraulics Div |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 1GR155-P16T-2SV | Eaton Corp Hydraulics Div (USA) |
| Reference | Meaning |
|---|---|
| 2122006 | D/9 Drawing number reference only U.S. Government activity |
| 199384 | 3/2 Design control — primary reference U.S. Government activity |
| 21122006 / FIND NO 51 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4820-01-689-2683 is a Valve,safety Relief, manufactured by Eaton Corp Hydraulics Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-689-2683 has 1 manufacturer part number on file: 1GR155-P16T-2SV (Eaton Corp Hydraulics Div).
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.