The Valve,check, cataloged under National Stock Number 4820-01-421-9627, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is D & D Machinery & Sales Inc. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-421-9627 |
| Primary Part Number | 01020800 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | D & D Machinery & Sales Inc |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Opening Pressure Setting | 3.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 01020800 PRIMARY | D & D Machinery & Sales Inc (USA) |
| Reference | Meaning |
|---|---|
| 01020800 | 5/9 Secondary reference Terex Aerials Inc |
NSN 4820-01-421-9627 is a Valve,check, manufactured by D & D Machinery & Sales Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-421-9627 has 1 manufacturer part number on file: 01020800 (D & D Machinery & Sales Inc).
Key specifications for 01020800: Flow Control Device: DISK; End Item Identification: 4940-01-385-1794; SUPPORT EQUIP,C-17A A; Opening Pressure Setting: 3.0 POUNDS PER SQUARE INCH LBS; Valve Operation Method: AUTOMATIC. 3 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.