The Valve,stop-Check, cataloged under National Stock Number 4820-01-351-7167, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Newdell Company, the Dba Ladish Valves. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-351-7167 |
| Primary Part Number | 5231-3091-TT01-A20A |
| Item Name | Valve,stop-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Newdell Company, the Dba Ladish Valves |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Nominal Pipe Size Accommodated | 2.000 INCHES ALL ENDS IN |
| Connection Style | SOCKET (PIPE) ALL ENDS |
| Mounting Position | HORIZONTAL |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Bonnet Type | PACKING RETAINING |
| Material | STEEL BODY |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| 5231-3091-TT01-A20A PRIMARY | Newdell Company, the Dba Ladish Valves (USA) |
| Reference | Meaning |
|---|---|
| 5231-9000-20 | 3/9 Design control — primary reference Clean Earth Environmental Group Inc. |
| 5231-9000-20 | 5/9 Secondary reference Newdell Company, the Dba Ladish Valves |
NSN 4820-01-351-7167 is a Valve,stop-Check, manufactured by Newdell Company, the Dba Ladish Valves, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-351-7167 has 1 manufacturer part number on file: 5231-3091-TT01-A20A (Newdell Company, the Dba Ladish Valves).
Key specifications for 5231-3091-TT01-A20A: Flow Control Device: DISK; Nominal Pipe Size Accommodated: 2.000 INCHES ALL ENDS IN; Connection Style: SOCKET (PIPE) ALL ENDS; Mounting Position: HORIZONTAL. 9 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.