The Valve,stop-Check, cataloged under National Stock Number 4820-01-425-1061, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Frick Co. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-425-1061 |
| Primary Part Number | 452501 |
| Item Name | Valve,stop-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Frick Co |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Nominal Pipe Size Accommodated | 2.500 INCHES ALL ENDS IN |
| Connection Style | SOCKET (PIPE) ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | BUTT WELD PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Bonnet Type | INSIDE SPRING |
| Maximum Operating Temp | 115.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Bonnet Attachment Method | INTEGRAL |
| Material | STEEL CORROSION RESISTING BODY |
| 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 |
|---|---|
| 452501 PRIMARY | Frick Co (USA) |
| Reference | Meaning |
|---|---|
| 9167536-1 | 5/9 Secondary reference U.S. Government activity |
| HWG-R-250-C | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-425-1061 is a Valve,stop-Check, manufactured by Frick Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-425-1061 has 1 manufacturer part number on file: 452501 (Frick Co).
Key specifications for 452501: Flow Control Device: DISK; Nominal Pipe Size Accommodated: 2.500 INCHES ALL ENDS IN; Connection Style: SOCKET (PIPE) ALL ENDS; Mounting Position: HORIZONTAL OR VERTICAL. 12 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.