The Valve,diaphragm,stop, cataloged under National Stock Number 4820-01-328-5437, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Swagelok Co. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-328-5437 |
| Primary Part Number | SS-DLS4 |
| Item Name | Valve,diaphragm,stop |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Swagelok Co |
| Status | ACTIVE |
| Material | STEEL CORROSION RESISTING BODY |
| 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 |
|---|---|
| SS-DLS4 PRIMARY | Swagelok Co (USA) |
| Reference | Meaning |
|---|---|
| SS-DLS4 | 5/9 Secondary reference Nupro Co |
NSN 4820-01-328-5437 is a Valve,diaphragm,stop, manufactured by Swagelok Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-328-5437 has 1 manufacturer part number on file: SS-DLS4 (Swagelok Co).
Key specifications for SS-DLS4: Material: STEEL CORROSION RESISTING BODY. 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.