The Valve,safety Relief, cataloged under National Stock Number 4820-01-539-8148, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mic Industries Inc Dba Mic Industries Inc Div Main. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-539-8148 |
| Primary Part Number | R-101-6303 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Mic Industries Inc Dba Mic Industries Inc Div Main |
| 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 |
|---|---|
| R-101-6303 PRIMARY | Mic Industries Inc Dba Mic Industries Inc Div Main (USA) |
| Reference | Meaning |
|---|---|
| 101-6303 | 5/9 Secondary reference Mic Industries Inc Dba Mic Industries Inc Div Main |
NSN 4820-01-539-8148 is a Valve,safety Relief, manufactured by Mic Industries Inc Dba Mic Industries Inc Div Main, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-539-8148 has 1 manufacturer part number on file: R-101-6303 (Mic Industries Inc Dba Mic Industries Inc Div Main).
Key specifications for R-101-6303: Part Name Assigned by Controlling Agency: RELIEF VALVE; End Item Identification: 3040-01-356-3472; ULTIMATE BUILDING MACHINE. 0 specifications are 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.