The Piston,valve, cataloged under National Stock Number 4820-01-090-4962, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ammcon Corp.. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-090-4962 |
| Primary Part Number | BMC3479A PART 12 |
| Item Name | Piston,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ammcon Corp. |
| Status | ACTIVE |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| BMC3479A PART 12 PRIMARY | Ammcon Corp. (USA) |
| Reference | Meaning |
|---|---|
| BMC3479A PART 12 | 5/9 Secondary reference Bidoro Mfg Co Po Box 103 Huntington Sta Ny 11746 |
| BMC3479C PART 12 | 5/9 Secondary reference Bidoro Mfg Co Po Box 103 Huntington Sta Ny 11746 |
NSN 4820-01-090-4962 is a Piston,valve, manufactured by Ammcon Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-090-4962 has 1 manufacturer part number on file: BMC3479A PART 12 (Ammcon Corp.).
Key specifications for BMC3479A PART 12: End Item Identification: VACUUM BREAKING VALVE,BIDORO MFR CO MODEL E-1; Material: COPPER ALLOY. 1 specification is 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.