The Disk,valve,metallic, cataloged under National Stock Number 4820-01-057-0617, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Walworth Company. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-057-0617 |
| Primary Part Number | 4DP-2748PC3-3/4IPS |
| Item Name | Disk,valve,metallic |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Walworth Company |
| Status | ACTIVE |
| General Characteristics Item Description | VALVE BRONZE PER MIL-B-16541; 1.219 IN. OD,0.750 IN. H; WALWORTH CO. 200W.S.P. DOUBLE UNION END SWING CHECK VALVE,NO. 424WS WALSEAL W |
| 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 |
|---|---|
| 4DP-2748PC3-3/4IPS PRIMARY | The Walworth Company (USA) |
| Reference | Meaning |
|---|---|
| 4DP-2748 | D/9 Drawing number reference only The Walworth Company |
| 4DP-2748PC3 | 5/1 Secondary reference The Walworth Company |
NSN 4820-01-057-0617 is a Disk,valve,metallic, manufactured by The Walworth Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-057-0617 has 1 manufacturer part number on file: 4DP-2748PC3-3/4IPS (The Walworth Company).
Key specifications for 4DP-2748PC3-3/4IPS: General Characteristics Item Description: VALVE BRONZE PER MIL-B-16541; 1.219 IN. OD,0.750 IN. H; WALWORTH CO. 200W.S.P. DOUBLE UNION END SWING CHECK VALVE,NO. 424WS WALSEAL W; End Item Identification: WALWORTH CO. 200 WSP BRONZE DOUBLE UNION END SWING CHECK VALVE,NO.424 WS WALSEAL,SIZE 3/4 IPS,DWG NO. 4DP-2748. 1 specification is 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.