The Valve,safety Relief, cataloged under National Stock Number 4820-01-723-2440, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bird-Johnson Propeller Company, Llc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Bird-Johnson Propeller Company, Llc (CAGE 07309); Airline Hydraulics Corp Dba Airline Hydraulics Corp (CAGE 04962) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-723-2440 |
| Primary Part Number | NMM000101-24 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Bird-Johnson Propeller Company, 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 |
|---|---|
| NMM000101-24 PRIMARY | Bird-Johnson Propeller Company, Llc (USA) |
| SVSS-5071RV/SS/WS | Airline Hydraulics Corp Dba Airline Hydraulics Corp (USA) |
| Reference | Meaning |
|---|---|
| NMM110300 REV J FIND 31 | C/1 Advisory reference — outside the item-of-supply concept Bird-Johnson Propeller Company, Llc |
| NMM110300 | D/9 Drawing number reference only Bird-Johnson Propeller Company, Llc |
NSN 4820-01-723-2440 is a Valve,safety Relief, manufactured by Bird-Johnson Propeller Company, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-723-2440 has 2 manufacturer part numbers on file: NMM000101-24 (Bird-Johnson Propeller Company, Llc), SVSS-5071RV/SS/WS (Airline Hydraulics Corp Dba Airline Hydraulics Corp).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-723-2442, 6695-01-723-3183. 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.