The Piston,valve, cataloged under National Stock Number 4820-01-436-2299, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bidoro Mfg Co Po Box 103 Huntington Sta Ny 11746. Government technical data includes 7 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4820-01-436-2299 |
| Primary Part Number | BMC-3479CCN PART 12 |
| Item Name | Piston,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Bidoro Mfg Co Po Box 103 Huntington Sta Ny 11746 |
| Status | ACTIVE |
| Valve Model Number for Which Designed | BMC-3479CCN |
| Outside Diameter | 1.344 INCHES NOMINAL IN |
| Material Document and Classification | ASTM B144 ASSN STD ALL MATERIAL RESPONSES |
| Valve Size for Which Designed | 1.000 INCHES IN |
| Inside Diameter | 0.813 INCHES NOMINAL IN |
| Valve Design Control Activity | 23798 |
| 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 |
|---|---|
| BMC-3479CCN PART 12 PRIMARY | Bidoro Mfg Co Po Box 103 Huntington Sta Ny 11746 (USA) |
| Reference | Meaning |
|---|---|
| BMC-3479CCN | D/9 Drawing number reference only Bidoro Mfg Co Po Box 103 Huntington Sta Ny 11746 |
NSN 4820-01-436-2299 is a Piston,valve, manufactured by Bidoro Mfg Co Po Box 103 Huntington Sta Ny 11746, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-436-2299 has 1 manufacturer part number on file: BMC-3479CCN PART 12 (Bidoro Mfg Co Po Box 103 Huntington Sta Ny 11746).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-436-2678, 4820-01-436-2882, 4820-01-451-9162. Verify interchangeability with system specifications before substitution.
Key specifications for BMC-3479CCN PART 12: Valve Model Number for Which Designed: BMC-3479CCN; Outside Diameter: 1.344 INCHES NOMINAL IN; Material Document and Classification: ASTM B144 ASSN STD ALL MATERIAL RESPONSES; Overall Length: 0.363 INCHES NOMINAL IN. 7 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.