The Cartridge,check Valve, cataloged under National Stock Number 4820-01-616-3312, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Sun Hydraulics Corporation. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Cartridge,check Valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Leonardo S.p.a. - Electronics Division - Defence Business Area (CAGE A0199); Sun Hydraulics Corporation (CAGE 54035); Lake Shore Systems, Inc. (CAGE 34712) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-616-3312 |
| Primary Part Number | RDDA-LWN |
| Item Name | Cartridge,check Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Sun Hydraulics Corporation |
| 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 |
|---|---|
| 182718780 | Leonardo S.p.a. - Electronics Division - Defence Business Area (ITA) |
| RDDA-LWN PRIMARY | Sun Hydraulics Corporation (USA) |
| F162908 ITEM NO. 18 | Lake Shore Systems, Inc. (USA) |
NSN 4820-01-616-3312 is a Cartridge,check Valve, manufactured by Sun Hydraulics Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-616-3312 has 3 manufacturer part numbers on file: 182718780 (Leonardo S.p.a. - Electronics Division - Defence Business Area), RDDA-LWN (Sun Hydraulics Corporation), F162908 ITEM NO. 18 (Lake Shore Systems, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-713-8372. Verify interchangeability with system specifications before substitution.
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.