The Valve,check, cataloged under National Stock Number 4820-01-500-5656, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hydac Corp. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Valve,check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Hydac Corp (CAGE 59793) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-500-5656 |
| Primary Part Number | RV10-1 0/12 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hydac Corp |
| 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 |
|---|---|
| RV10-1 0/12 PRIMARY | Hydac Corp (USA) |
| Reference | Meaning |
|---|---|
| 82-22392-12 | 5/9 Secondary reference Macgregor Usa Inc. Div Macgregor Usa |
| 82-22392 | D/9 Drawing number reference only Macgregor Usa Inc. Div Macgregor Usa |
| 83-23106 ITEM 47 | 5/9 Secondary reference Macgregor Usa Inc. Div Macgregor Usa |
| 82-23105-12 | 5/9 Secondary reference Macgregor Usa Inc. Div Macgregor Usa |
| 82-23105 | D/9 Drawing number reference only Macgregor Usa Inc. Div Macgregor Usa |
| 82-23105-47 | 5/9 Secondary reference Macgregor Usa Inc. Div Macgregor Usa |
| 83-23106 ITEM 12 | 5/9 Secondary reference Macgregor Usa Inc. Div Macgregor Usa |
NSN 4820-01-500-5656 is a Valve,check, manufactured by Hydac Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-500-5656 has 1 manufacturer part number on file: RV10-1 0/12 (Hydac Corp).
1 possible match (shared part number, not a government interchangeability claim): 4810-01-508-9210. 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.