The Seat,valve, cataloged under National Stock Number 4820-01-464-5486, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Lawler Manufacturing Company, Inc.. Government technical data includes 7 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-464-5486 |
| Primary Part Number | 1663-D PC19 2IN |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Lawler Manufacturing Company, Inc. |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.375 INCHES NOMINAL IN |
| Flange Diameter | 2.125 INCHES NOMINAL IN |
| Style Designator | THREADED FLANGED |
| Body Inside Diameter | 1.718 INCHES NOMINAL IN |
| Under Flange Height | 0.750 INCHES NOMINAL IN |
| Material | COPPER ALLOY SEAT |
| 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 |
|---|---|
| 1663-D PC19 2IN PRIMARY | Lawler Manufacturing Company, Inc. (USA) |
| 3281-02 | Lawler Manufacturing Company, Inc. (USA) |
NSN 4820-01-464-5486 is a Seat,valve, manufactured by Lawler Manufacturing Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-464-5486 has 2 manufacturer part numbers on file: 1663-D PC19 2IN (Lawler Manufacturing Company, Inc.), 3281-02 (Lawler Manufacturing Company, Inc.).
Key specifications for 1663-D PC19 2IN: Flange Seat to Disk End Height: 0.375 INCHES NOMINAL IN; Flange Diameter: 2.125 INCHES NOMINAL IN; Style Designator: THREADED FLANGED; Body Inside Diameter: 1.718 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.