The Head,safety,pressure Relief, cataloged under National Stock Number 4820-01-288-9863, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bs&b Safety Systems Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Head,safety,pressure Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Bs&b Safety Systems Llc (CAGE 32874) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-288-9863 |
| Primary Part Number | A7 |
| Item Name | Head,safety,pressure Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Bs&b Safety Systems Llc |
| 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 |
|---|---|
| A7 PRIMARY | Bs&b Safety Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| 8524616 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 4820-01-288-9863 is a Head,safety,pressure Relief, manufactured by Bs&b Safety Systems Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-288-9863 has 1 manufacturer part number on file: A7 (Bs&b Safety Systems Llc).
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.