The Valve,safety Relief, cataloged under National Stock Number 4820-01-293-4394, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Brooks T J Co. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Brooks T J Co (CAGE 67089) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-293-4394 |
| Primary Part Number | DH33-20 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Brooks T J Co |
| 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 |
|---|---|
| 6607804 ITEM 14 | Brooks T J Co (USA) |
| DH33-20 PRIMARY | Brooks T J Co (USA) |
| Reference | Meaning |
|---|---|
| 6607804 | D/9 Drawing number reference only Brooks T J Co |
NSN 4820-01-293-4394 is a Valve,safety Relief, manufactured by Brooks T J Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-293-4394 has 2 manufacturer part numbers on file: 6607804 ITEM 14 (Brooks T J Co), DH33-20 (Brooks T J Co).
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.