The Pressure Relief Valve Kit, cataloged under National Stock Number 4820-01-536-8308, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Norvell Electronics Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 4820-01-536-8308 |
| Primary Part Number | 57K495 |
| Item Name | Pressure Relief Valve Kit |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Norvell Electronics Inc |
| Status | ACTIVE |
| Supplementary Features | KIT INCLUDES 1 EACH - VALVE PRESSURE RELIEF, P/N 12502063 (CAGE 19207) AND STRAIGHT THREAD ELBOW, P/N 12502203 (CAGE 19207); KIT IS DESIGNED FOR FIELD AND INDUSTRIAL MODIFICATION PURPOSES ONLY AND APPLIES TO ALL M901, M981, AND LAV-1T-A1 VEHICLES |
| 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 |
|---|---|
| 57K495 PRIMARY | Norvell Electronics Inc (USA) |
| Reference | Meaning |
|---|---|
| 57K4953 | 5/9 Secondary reference U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 4820-01-536-8308 is a Pressure Relief Valve Kit, manufactured by Norvell Electronics Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-536-8308 has 1 manufacturer part number on file: 57K495 (Norvell Electronics Inc).
Key specifications for 57K495: Supplementary Features: KIT INCLUDES 1 EACH - VALVE PRESSURE RELIEF, P/N 12502063 (CAGE 19207) AND STRAIGHT THREAD ELBOW, P/N 12502203 (CAGE 19207); KIT IS DESIGNED FOR FIELD AND INDUSTRIAL MODIFICATION PURPOSES ONLY AND APPLIES TO ALL M901, M981, AND LAV-1T-A1 VEHICLES; End Item Identification: 2320-01-494-7616. 1 specification is 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.