The Valve,restrictor Check, cataloged under National Stock Number 4820-00-516-1058, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Preece Inc Decca Valves Div. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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,restrictor Check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Preece Inc Decca Valves Div (CAGE 50276); The Boeing Company Div Defense (CAGE 76301) |
| Parameter | Value |
|---|---|
| NSN | 4820-00-516-1058 |
| Primary Part Number | 7M844-3 |
| Item Name | Valve,restrictor Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Preece Inc Decca Valves Div |
| 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 |
|---|---|
| 7M844-3 PRIMARY | Preece Inc Decca Valves Div (USA) |
| 7M844-3 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 9R3300 | 5/2 Secondary reference U.S. Government activity |
| 68B690101-129 | 5/9 Secondary reference The Boeing Company Div Defense |
| 7M844 | D/9 Drawing number reference only The Boeing Company Div Defense |
| 7M844-3 | 5/2 Secondary reference U.S. Government activity |
| 5590-129 | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 4820-00-516-1058 is a Valve,restrictor Check, manufactured by Preece Inc Decca Valves Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-516-1058 has 2 manufacturer part numbers on file: 7M844-3 (Preece Inc Decca Valves Div), 7M844-3 (The Boeing Company Div Defense).
2 possible matches (shared part number, not a government interchangeability claim): 4820-00-516-1062, 4820-00-518-1172. 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.
NSN 4820-00-516-1058 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.