The Cock,poppet Drain, cataloged under National Stock Number 4820-00-516-3739, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is De Havilland Aircraft of Canada Limited. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-00-516-3739 |
| Primary Part Number | C2P623A |
| Item Name | Cock,poppet Drain |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | De Havilland Aircraft of Canada Limited |
| Status | ACTIVE |
| Flow Control Device | PISTON |
| Nominal Pipe Size Accommodated | 0.250 INCHES FIRST END IN |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | STRAIGHT THRU |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.250 INCHES FIRST END IN |
| Material | COPPER ALLOY BODY |
| Material | COPPER ALLOY AND RUBBER SYNTHETIC FLOW CONTROL DEVICE |
| Thread Series Designator | NPT FIRST END |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| C2P623A | De Havilland Aircraft of Canada Limited (CAN) |
| Reference | Meaning |
|---|---|
| BJ1000AS1MX | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-516-3739 is a Cock,poppet Drain, manufactured by De Havilland Aircraft of Canada Limited, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-516-3739 has 1 manufacturer part number on file: C2P623A (De Havilland Aircraft of Canada Limited).
Key specifications for C2P623A: Flow Control Device: PISTON; Nominal Pipe Size Accommodated: 0.250 INCHES FIRST END IN; Connection Style: PLAIN (PIPE) FIRST END; Connection Type: THREADED EXTERNAL PIPE FIRST END. 11 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.