The Cock,shutoff,screw Stem, cataloged under National Stock Number 4820-01-596-1587, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Enerpac Tool Group Corp. Government technical data includes 15 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-596-1587 |
| Primary Part Number | NV-251 |
| Item Name | Cock,shutoff,screw Stem |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Enerpac Tool Group Corp |
| Status | ACTIVE |
| Flow Control Device | NEEDLE |
| Connection Style | PLAIN, OPTIONAL END (PIPE) SECOND END |
| Connection Style | PLAIN, OPTIONAL END (PIPE) FIRST END |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Style Designator | ANGLE |
| Operating Pressure | 700.0 BAR MAXIMUM SINGLE RESPONSE |
| Thread Direction | RIGHT-HAND SECOND END |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.375 INCHES SECOND END IN |
| Nominal Thread Size | 0.500 INCHES FIRST END IN |
| Material | STEEL BODY |
| Thread Series Designator | NPT SECOND END |
| Thread Series Designator | NPT FIRST END |
| 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 |
|---|---|
| NV-251 PRIMARY | Enerpac Tool Group Corp (USA) |
| Reference | Meaning |
|---|---|
| H547-2003-348 | 5/1 Secondary reference U.S. Government activity |
| 167-7066805-348 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 4820-01-596-1587 is a Cock,shutoff,screw Stem, manufactured by Enerpac Tool Group Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-596-1587 has 1 manufacturer part number on file: NV-251 (Enerpac Tool Group Corp).
Key specifications for NV-251: Flow Control Device: NEEDLE; Connection Style: PLAIN, OPTIONAL END (PIPE) SECOND END; Connection Style: PLAIN, OPTIONAL END (PIPE) FIRST END; Connection Type: THREADED INTERNAL PIPE FIRST END. 15 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.