The Stem,fluid Valve, cataloged under National Stock Number 4820-01-228-7836, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Derbyshire Machine & Tool Co. Government technical data includes 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-228-7836 |
| Primary Part Number | 56145 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| Stem Actuating End Type | THREADED EXTERNALLY |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 56145 | Derbyshire Machine & Tool Co (USA) |
| Reference | Meaning |
|---|---|
| 3222267 | D/9 Drawing number reference only U.S. Government activity |
| 3222267 PIECE 117 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-228-7836 is a Stem,fluid Valve, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-228-7836 has 1 manufacturer part number on file: 56145 (Derbyshire Machine & Tool Co).
3 possible matches (shared part number, not a government interchangeability claim): 5999-01-460-5543, 6130-01-571-4659, 5360-01-669-2137. Verify interchangeability with system specifications before substitution.
Key specifications for 56145: Stem Actuating End Type: THREADED EXTERNALLY; Overall Length: 20.750 INCHES NOMINAL IN; Material: COPPER ALLOY. 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.