The Parts Kit,valve, cataloged under National Stock Number 4820-01-544-1071, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Derbyshire Machine & Tool Co. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-544-1071 |
| Primary Part Number | 2640-800X1IT62,2640-801X1IT22 |
| Item Name | Parts Kit,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 845-4558779 ITEM 9,10 | Naval Sea Systems Command (USA) |
| 2640-800X1IT62,2640-801X1IT22 PRIMARY | Derbyshire Machine & Tool Co (USA) |
| 845-7284929 ITEM 9,11 | Naval Sea Systems Command (USA) |
| 2640-800X1IT62,2640-801X1IT22 PRIMARY | Portland Valve Llc (USA) |
| 845-8616960 ITEM 9,20 | Naval Sea Systems Command (USA) |
| 845-8617511 PC62,845-7285291PC22 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 2640-800X1IT62,2640-801X1IT22 | 3/2 Design control — primary reference U.S. Government activity |
| 2644-820-10 ITEM 9,20 | 5/2 Secondary reference U.S. Government activity |
| 2643-820-88 ITEM 9,11 | 5/2 Secondary reference U.S. Government activity |
| 2642-822-10 ITEM 9,10 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-544-1071 is a Parts Kit,valve, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-544-1071 has 6 manufacturer part numbers on file: 845-4558779 ITEM 9,10 (Naval Sea Systems Command), 2640-800X1IT62,2640-801X1IT22 (Derbyshire Machine & Tool Co), 845-7284929 ITEM 9,11 (Naval Sea Systems Command), 2640-800X1IT62,2640-801X1IT22 (Portland Valve Llc), 845-8616960 ITEM 9,20 (Naval Sea Systems Command) and 1 more.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-544-5836. Verify interchangeability with system specifications before substitution.
Key specifications for 2640-800X1IT62,2640-801X1IT22: End Item Identification: VALVE,BALL 3IN; VALVE B 3.00NPS 700PSI BTWLD CUNI; VALVE B 3.00IPS 700 IPS BTWLD CUNI IN. 0 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.