The Disk,valve, cataloged under National Stock Number 4820-01-425-3707, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-425-3707 |
| Primary Part Number | 1291-4IN PIECE 4 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| Status | ACTIVE |
| Pressure Rating | 225.0 POUNDS PER SQUARE INCH (PSI) NOMINAL AND 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Style Designator | SWING CHECK |
| Media for Which Designed | GAS OR OIL |
| 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 |
|---|---|
| 1291-4IN PIECE 4 PRIMARY | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| 1291-4.00IN PC4 | C/1 Advisory reference — outside the item-of-supply concept Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
NSN 4820-01-425-3707 is a Disk,valve, manufactured by Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-425-3707 has 1 manufacturer part number on file: 1291-4IN PIECE 4 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc).
Key specifications for 1291-4IN PIECE 4: Pressure Rating: 225.0 POUNDS PER SQUARE INCH (PSI) NOMINAL AND 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Style Designator: SWING CHECK; Special Features: VALVE,CHECK SWG; Media for Which Designed: GAS OR OIL. 4 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.