The Valve,check, cataloged under National Stock Number 4820-01-643-5347, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Parker Hannifin Corp Hydraulic Valve Div. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-643-5347 |
| Primary Part Number | 6F-C6L-1-SS |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Parker Hannifin Corp Hydraulic Valve Div |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Flange Shape | HEXAGON ALL ENDS |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | ASTM A 276 TYPE 316 NATIONAL SPEC SINGLE MATERIAL RESPONSE BODY |
| Operating Pressure | 6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 0.375 INCHES IN |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.375 INCHES ALL ENDS IN |
| Maximum Operating Temp | 400.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nominal Outside Diameter | 0.375 INCHES ALL ENDS IN |
| Face to Face Distance | 3.03 INCHES IN |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | STEEL CORROSION RESISTING BODY |
| Material | RUBBER FLUOROCARBON CLASS FPM SEAT |
| Thread Series Designator | NPT ALL ENDS |
| Opening Pressure Setting | 1.0 POUNDS PER SQUARE INCH LBS |
| 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 |
|---|---|
| 6F-C6L-1-SS | W. W. Grainger, Inc. (USA) |
| 6F-C6L-1-SS PRIMARY | Parker Hannifin Corp Hydraulic Valve Div (USA) |
NSN 4820-01-643-5347 is a Valve,check, manufactured by Parker Hannifin Corp Hydraulic Valve Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-643-5347 has 2 manufacturer part numbers on file: 6F-C6L-1-SS (W. W. Grainger, Inc.), 6F-C6L-1-SS (Parker Hannifin Corp Hydraulic Valve Div).
Key specifications for 6F-C6L-1-SS: Flow Control Device: POPPET; Flange Shape: HEXAGON ALL ENDS; Connection Style: PLAIN, OPTIONAL END (PIPE) ALL ENDS; Mounting Position: HORIZONTAL OR VERTICAL. 20 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.