The Valve,releif, cataloged under National Stock Number 4820-00-124-2362, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ralbo Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-124-2362 |
| Primary Part Number | 475R01 |
| Item Name | Valve,releif |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ralbo Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 475R01 PRIMARY | Ralbo Inc (USA) |
| MPL554 | Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc (USA) |
| Reference | Meaning |
|---|---|
| 509979 | D/9 Drawing number reference only U.S. Government activity |
| 509979-2 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 4820-00-124-2362 is a Valve,releif, manufactured by Ralbo Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-124-2362 has 2 manufacturer part numbers on file: 475R01 (Ralbo Inc), MPL554 (Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc).
1 possible match (shared part number, not a government interchangeability claim): 1720-00-917-4377. Verify interchangeability with system specifications before substitution.
Key specifications for 475R01: Part Name Assigned by Controlling Agency: RELIEF, VALVE. 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.
NSN 4820-00-124-2362 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.