The Parts Kit,diaphragm Replacement, cataloged under National Stock Number 4820-01-275-4526, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Parts Kit,diaphragm Replacement |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division (CAGE 09990) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-275-4526 |
| Primary Part Number | 5151HK-20 |
| Item Name | Parts Kit,diaphragm Replacement |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 5151HK-20 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division (USA) |
| Reference | Meaning |
|---|---|
| 5151HK-20S | C/1 Advisory reference — outside the item-of-supply concept Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division |
| 5151HK-20 | 5/9 Secondary reference Parker-Hannifin Corp Fluidpower Group Mobile Hydraulics Div |
NSN 4820-01-275-4526 is a Parts Kit,diaphragm Replacement, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-275-4526 has 1 manufacturer part number on file: 5151HK-20 (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division).
1 possible match (shared part number, not a government interchangeability claim): 5930-01-277-8576. Verify interchangeability with system specifications before substitution.
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.