The Seat,valve, cataloged under National Stock Number 4820-00-424-2731, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Siemens Water Technologies Corp. Div Wallace & Tiernan Products. Government technical data includes 9 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-424-2731 |
| Primary Part Number | P11521 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Siemens Water Technologies Corp. Div Wallace & Tiernan Products |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.125 INCHES NOMINAL IN |
| Flange Diameter | 0.547 INCHES NOMINAL IN |
| FSC Application Data | FEEDER,WATER METER DRIVE |
| Body Outside Diameter | 0.250 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.172 INCHES NOMINAL IN |
| Under Flange Height | 0.042 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN |
| Material | NICKEL OR COPPER 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 |
|---|---|
| P11521 PRIMARY | Siemens Water Technologies Corp. Div Wallace & Tiernan Products (USA) |
NSN 4820-00-424-2731 is a Seat,valve, manufactured by Siemens Water Technologies Corp. Div Wallace & Tiernan Products, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-424-2731 has 1 manufacturer part number on file: P11521 (Siemens Water Technologies Corp. Div Wallace & Tiernan Products).
Key specifications for P11521: Flange Seat to Disk End Height: 0.125 INCHES NOMINAL IN; Flange Diameter: 0.547 INCHES NOMINAL IN; FSC Application Data: FEEDER,WATER METER DRIVE; Body Outside Diameter: 0.250 INCHES NOMINAL IN. 9 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.