The Valve,safety Relief, cataloged under National Stock Number 4820-01-428-6413, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Danfoss Fluid Power Inc Easley Opn. The record lists 6 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Wartsila Netherlands (CAGE H1512); Danfoss Fluid Power Inc Easley Opn (CAGE 8Z296); Paul-Munroe Hydraulics Inc (CAGE 1W752); Lips Usa Inc (CAGE 0ZXN8) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-428-6413 |
| Primary Part Number | 1SD10-R20S |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Danfoss Fluid Power Inc Easley Opn |
| Status | ACTIVE |
| 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 |
|---|---|
| W000505816-9 | Wartsila Netherlands (NLD) |
| A220026/0.500.203-9 | Wartsila Netherlands (NLD) |
| 1SD10-R20S PRIMARY | Danfoss Fluid Power Inc Easley Opn (USA) |
| 1SD10-R20S | Paul-Munroe Hydraulics Inc (USA) |
| A220026/0.500.203-9 | Lips Usa Inc (USA) |
| W000505816-9 | Lips Usa Inc (USA) |
| Reference | Meaning |
|---|---|
| A220026/0.500.2 | C/1 Advisory reference — outside the item-of-supply concept Lips Usa Inc |
| A220026/0.500.2 | C/1 Advisory reference — outside the item-of-supply concept Wartsila Netherlands |
NSN 4820-01-428-6413 is a Valve,safety Relief, manufactured by Danfoss Fluid Power Inc Easley Opn, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-428-6413 has 6 manufacturer part numbers on file: W000505816-9 (Wartsila Netherlands), A220026/0.500.203-9 (Wartsila Netherlands), 1SD10-R20S (Danfoss Fluid Power Inc Easley Opn), 1SD10-R20S (Paul-Munroe Hydraulics Inc), A220026/0.500.203-9 (Lips Usa Inc) and 1 more.
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.