The Seat,valve, cataloged under National Stock Number 4820-00-623-8538, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Singer Valve Inc. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-00-623-8538 |
| Primary Part Number | A0363-3 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Singer Valve Inc |
| Status | ACTIVE |
| Style Designator | THREADED FLANGED |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| A0363-3 PRIMARY | Singer Valve Inc (CAN) |
| 3711686PC13 | Aircraft Appliances and Equipment Limited Div Aircraft Appliances and Equipment Ltd. (CAN) |
| A0363-13 | Aircraft Appliances and Equipment Limited Div Aircraft Appliances and Equipment Ltd. (CAN) |
| Reference | Meaning |
|---|---|
| A0363 | D/9 Drawing number reference only Singer Valve Inc |
NSN 4820-00-623-8538 is a Seat,valve, manufactured by Singer Valve Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-623-8538 has 3 manufacturer part numbers on file: A0363-3 (Singer Valve Inc), 3711686PC13 (Aircraft Appliances and Equipment Limited Div Aircraft Appliances and Equipment Ltd.), A0363-13 (Aircraft Appliances and Equipment Limited Div Aircraft Appliances and Equipment Ltd.).
Key specifications for A0363-3: Style Designator: THREADED FLANGED; Material: STEEL OVERALL. 2 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.