The Valve,check, cataloged under National Stock Number 4820-01-648-1693, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is International Valve Corp Dba Check-All Valve Mfg. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-648-1693 |
| Primary Part Number | U3CBREP.500SS |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | International Valve Corp Dba Check-All Valve Mfg. Co. |
| Status | ACTIVE |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Valve Size | 0.375 INCHES IN |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.375 INCHES ALL ENDS IN |
| Face to Face Distance | 2.16 INCHES IN |
| Material | COPPER ALLOY BODY |
| Material | RUBBER ETHYLENE-PROPYLENE CLASS EPM SEAT |
| Thread Series Designator | NPT ALL ENDS |
| Opening Pressure Setting | 0.500 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 |
|---|---|
| U3CBREP.500SS PRIMARY | International Valve Corp Dba Check-All Valve Mfg. Co. (USA) |
NSN 4820-01-648-1693 is a Valve,check, manufactured by International Valve Corp Dba Check-All Valve Mfg. Co., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-648-1693 has 1 manufacturer part number on file: U3CBREP.500SS (International Valve Corp Dba Check-All Valve Mfg. Co.).
Key specifications for U3CBREP.500SS: Connection Style: PLAIN, OPTIONAL END (PIPE) ALL ENDS; Connection Type: THREADED INTERNAL PIPE ALL ENDS; Style Designator: STRAIGHT THRU; Valve Size: 0.375 INCHES IN. 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.