The Head,safety,pressure Relief, cataloged under National Stock Number 4820-01-253-7383, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Avox Systems Inc Dba Avox Systems Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Head,safety,pressure Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Avox Systems Inc Dba Avox Systems Inc (CAGE 53655) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-253-7383 |
| Primary Part Number | 26954-00 |
| Item Name | Head,safety,pressure Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Avox Systems Inc Dba Avox Systems Inc |
| 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 |
|---|---|
| 26954-00 PRIMARY | Avox Systems Inc Dba Avox Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 26954 | D/9 Drawing number reference only Avox Systems Inc Dba Avox Systems Inc |
NSN 4820-01-253-7383 is a Head,safety,pressure Relief, manufactured by Avox Systems Inc Dba Avox Systems Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-253-7383 has 1 manufacturer part number on file: 26954-00 (Avox Systems Inc Dba Avox Systems Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5895-01-354-8436, 6145-01-655-1793. Verify interchangeability with system specifications before substitution.
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.