The Tool,bleeder, cataloged under National Stock Number 4820-01-442-0572, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-442-0572 |
| Primary Part Number | 95-D-296 ITEM 24 |
| Item Name | Tool,bleeder |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| Overall Diameter | 0.562 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| Thread Size and Series/type Designator | 7/16-20 UNF |
| 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 |
|---|---|
| 95-D-296 ITEM 24 PRIMARY | Derbyshire Machine & Tool Co (USA) |
| Reference | Meaning |
|---|---|
| 95-D-296 | D/9 Drawing number reference only Derbyshire Machine & Tool Co |
NSN 4820-01-442-0572 is a Tool,bleeder, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-442-0572 has 1 manufacturer part number on file: 95-D-296 ITEM 24 (Derbyshire Machine & Tool Co).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-442-0574, 4820-01-442-0575. Verify interchangeability with system specifications before substitution.
Key specifications for 95-D-296 ITEM 24: Overall Diameter: 0.562 INCHES NOMINAL IN; End Item Identification: 1340-01-097-6365; NIMITZ CLASS CVN; Material: STEEL CORROSION RESISTING; Thread Size and Series/type Designator: 7/16-20 UNF. 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.