The Valve,check, cataloged under National Stock Number 4820-01-365-6952, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-365-6952 |
| Primary Part Number | C-2420-S-45 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 1.875 INCHES ALL ENDS IN |
| Thread Series Designator | UNF ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| AMO-692 ITEM 8 | Appleton Marine Inc (USA) |
| C-2420-S-45 PRIMARY | Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division (USA) |
| YMD-5648 | Appleton Marine Inc (USA) |
NSN 4820-01-365-6952 is a Valve,check, manufactured by Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-365-6952 has 3 manufacturer part numbers on file: AMO-692 ITEM 8 (Appleton Marine Inc), C-2420-S-45 (Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division), YMD-5648 (Appleton Marine Inc).
Key specifications for C-2420-S-45: Flow Control Device: DISK; Thread Direction: RIGHT-HAND ALL ENDS; Nominal Thread Size: 1.875 INCHES ALL ENDS IN; Thread Series Designator: UNF ALL ENDS. 5 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.