The Valve,check, cataloged under National Stock Number 4820-01-703-0634, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Straval Machine Co Inc. Government technical data includes 14 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 | 4820-01-703-0634 |
| Primary Part Number | CKV05-10T |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Straval Machine Co Inc |
| Status | ACTIVE |
| Flow Control Device | PISTON |
| Furnished Items and Quantity | 1 SEAL AND 1 SPRING |
| Connection Style | PLAIN, OPTIONAL END (PIPE) FIRST END |
| Connection Style | PLAIN (PIPE) SECOND END |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Connection Type | THREADED EXTERNAL PIPE SECOND END |
| Style Designator | STRAIGHT THRU |
| Valve Size | 1.000 INCHES IN |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 1.000 INCHES ALL ENDS IN |
| Face to Face Distance | 3.4375 INCHES IN |
| Material | STEEL COMP 303 AND STEEL COMP 316 BODY |
| Thread Series Designator | NPT 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 |
|---|---|
| CKV05-10T PRIMARY | Straval Machine Co Inc (USA) |
NSN 4820-01-703-0634 is a Valve,check, manufactured by Straval Machine Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-703-0634 has 1 manufacturer part number on file: CKV05-10T (Straval Machine Co Inc).
Key specifications for CKV05-10T: Flow Control Device: PISTON; Furnished Items and Quantity: 1 SEAL AND 1 SPRING; Connection Style: PLAIN, OPTIONAL END (PIPE) FIRST END; Connection Style: PLAIN (PIPE) SECOND END. 14 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.