The Valve,safety Relief, cataloged under National Stock Number 4820-01-657-3735, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Sun Hydraulics Corporation. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Sun Hydraulics Corporation (CAGE 54035) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-657-3735 |
| Primary Part Number | PRDC-CVI/AP-100PSI |
| Item Name | Valve,safety Relief |
| 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 |
|---|---|
| PRDC-CVI/AP-100PSI PRIMARY | Sun Hydraulics Corporation (USA) |
| Reference | Meaning |
|---|---|
| HI-1458-3000 ITEM NO 17 | C/1 Advisory reference — outside the item-of-supply concept Hhe Services, Inc. |
| HI-1458-3000 | D/9 Drawing number reference only Hhe Services, Inc. |
| PRDC-CSV/AP | 5/9 Secondary reference Sun Hydraulics Corporation |
NSN 4820-01-657-3735 is a Valve,safety Relief, manufactured by Sun Hydraulics Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-657-3735 has 1 manufacturer part number on file: PRDC-CVI/AP-100PSI (Sun Hydraulics Corporation).
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-657-3738, 4730-01-657-3745, 6115-01-657-5248. 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.