The Valve,safety Relief, cataloged under National Stock Number 4820-01-440-7279, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Sun Hydraulics Corporation. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-440-7279 |
| Primary Part Number | RDHA-LBV-IAN/S |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Sun Hydraulics Corporation |
| Status | ACTIVE |
| Style Designator | ANGLE |
| Adjustable Pressure Range | +300.0 TO 1500.0 POUNDS PER SQUARE INCH LBS |
| Material | STEEL BODY |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 2D3-05192 IT NO 90 | Lake Shore Systems, Inc. (USA) |
| RDHA-LBV-IAN/S PRIMARY | Sun Hydraulics Corporation (USA) |
| Reference | Meaning |
|---|---|
| 2D3-05192 | D/9 Drawing number reference only Lake Shore Systems, Inc. |
| RDHA-LBV-1AN/S | C/1 Advisory reference — outside the item-of-supply concept Sun Hydraulics Corporation |
NSN 4820-01-440-7279 is a Valve,safety Relief, manufactured by Sun Hydraulics Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-440-7279 has 2 manufacturer part numbers on file: 2D3-05192 IT NO 90 (Lake Shore Systems, Inc.), RDHA-LBV-IAN/S (Sun Hydraulics Corporation).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-441-5244. Verify interchangeability with system specifications before substitution.
Key specifications for RDHA-LBV-IAN/S: Style Designator: ANGLE; Adjustable Pressure Range: +300.0 TO 1500.0 POUNDS PER SQUARE INCH LBS; Part Name Assigned by Controlling Agency: DIRECT ACTING RELIEF VALVE; End Item Identification: WASP CLASS LHD. 4 specifications are 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.