The Seat,valve, cataloged under National Stock Number 4820-01-057-6897, 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 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-057-6897 |
| Primary Part Number | 51162-B-380 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.098 INCHES NOMINAL IN |
| Flange Diameter | 0.562 INCHES NOMINAL IN |
| Body Outside Diameter | 0.370 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.280 INCHES NOMINAL IN |
| Under Flange Height | 0.175 INCHES NOMINAL IN |
| Material | NICKEL ALLOY OVERALL |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| 1194PC9 1-4IN | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| 51162-B-380 PRIMARY | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| 51162B | C/1 Advisory reference — outside the item-of-supply concept Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
NSN 4820-01-057-6897 is a Seat,valve, manufactured by Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-057-6897 has 2 manufacturer part numbers on file: 1194PC9 1-4IN (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 51162-B-380 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc).
Key specifications for 51162-B-380: Flange Seat to Disk End Height: 0.098 INCHES NOMINAL IN; Flange Diameter: 0.562 INCHES NOMINAL IN; Body Outside Diameter: 0.370 INCHES NOMINAL IN; Style Designator: PLAIN FLANGED. 8 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.