The Valve,vacuum Breaking, cataloged under National Stock Number 4820-01-702-2883, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ammcon Corp.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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,vacuum Breaking |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Ammcon Corp. (CAGE 6W889) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-702-2883 |
| Primary Part Number | 7508174 |
| Item Name | Valve,vacuum Breaking |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ammcon Corp. |
| 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 |
|---|---|
| 7508174 PRIMARY | Ammcon Corp. (USA) |
| Reference | Meaning |
|---|---|
| BMC 3479A-1 | D/9 Drawing number reference only Ammcon Corp. |
NSN 4820-01-702-2883 is a Valve,vacuum Breaking, manufactured by Ammcon Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-702-2883 has 1 manufacturer part number on file: 7508174 (Ammcon Corp.).
3 possible matches (shared part number, not a government interchangeability claim): 4810-01-702-4379, 4810-01-702-4518, 4810-01-702-5341. 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.