The Cock,shutoff,screw Stem, cataloged under National Stock Number 4820-01-425-8718, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Cock,shutoff,screw Stem |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc (CAGE 0ASY6); Aircraft Appliances and Equipment Limited Div Aircraft Appliances and Equipment Ltd. (CAGE 35076) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-425-8718 |
| Primary Part Number | M1051-2-II-A/MPL2220 |
| Item Name | Cock,shutoff,screw Stem |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc |
| Status | ACTIVE |
| 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 |
|---|---|
| M1051-2-II-A/MPL2220 PRIMARY | Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc (USA) |
| 740478 PC 75 | Aircraft Appliances and Equipment Limited Div Aircraft Appliances and Equipment Ltd. (CAN) |
| 740953 | Aircraft Appliances and Equipment Limited Div Aircraft Appliances and Equipment Ltd. (CAN) |
| Reference | Meaning |
|---|---|
| 861014 | 5/9 Secondary reference Aircraft Appliances and Equipment Limited Div Aircraft Appliances and Equipment Ltd. |
| M1051-2-II-A | 5/1 Secondary reference Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc |
NSN 4820-01-425-8718 is a Cock,shutoff,screw Stem, manufactured by Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-425-8718 has 3 manufacturer part numbers on file: M1051-2-II-A/MPL2220 (Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc), 740478 PC 75 (Aircraft Appliances and Equipment Limited Div Aircraft Appliances and Equipment Ltd.), 740953 (Aircraft Appliances and Equipment Limited Div Aircraft Appliances and Equipment Ltd.).
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.