The Valve,safety Relief, cataloged under National Stock Number 4820-01-436-7639, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Northern Lights 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-436-7639 |
| Primary Part Number | 140036220 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Northern Lights 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 |
|---|---|
| 140036220 PRIMARY | Northern Lights Inc (USA) |
| Reference | Meaning |
|---|---|
| 140036120 | 5/9 Secondary reference Northern Lights Inc |
NSN 4820-01-436-7639 is a Valve,safety Relief, manufactured by Northern Lights Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-436-7639 has 1 manufacturer part number on file: 140036220 (Northern Lights Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-664-9466. Verify interchangeability with system specifications before substitution.
Key specifications for 140036220: End Item Identification: PROPULSION SYSTEM. 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.