The Valve,safety Relief, cataloged under National Stock Number 4820-01-697-8899, 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 2 specifications, cited from the U.S. Government catalog. 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.
| Parameter | Value |
|---|---|
| NSN | 4820-01-697-8899 |
| Primary Part Number | RPKC-LEN/AP |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Sun Hydraulics Corporation |
| Status | ACTIVE |
| Operating Pressure | 5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Material | STEEL CORROSION RESISTING OVERALL |
| 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 |
|---|---|
| 406-8005 | Marvin Land Systems, Inc. (USA) |
| 406-8005/ SHEET 1 | Marvin Land Systems, Inc. (USA) |
| RPKC-LEN/AP PRIMARY | Sun Hydraulics Corporation (USA) |
NSN 4820-01-697-8899 is a Valve,safety Relief, manufactured by Sun Hydraulics Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-697-8899 has 3 manufacturer part numbers on file: 406-8005 (Marvin Land Systems, Inc.), 406-8005/ SHEET 1 (Marvin Land Systems, Inc.), RPKC-LEN/AP (Sun Hydraulics Corporation).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-699-8987. Verify interchangeability with system specifications before substitution.
Key specifications for RPKC-LEN/AP: Operating Pressure: 5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Special Features: MAIN ORIFICE IS PROTECTED BY A 150 MICRON STAINLESS STEEL SCREEN;BACK PRESSURE ON THE TANK PORT (PORT 2)IS DIRECTLY ADDITIVE TO THE VALVE SETTING AT A 1:1 RATIO;ADJUSTMENT-NUMBER OF CLOCKWISE TURNS TO INCREASE SETTING:55;VALVE HEX SIZE:1.0625 INCHES;VALVE INSTALLATION TORQUE:350-375 LBF FEET 474-508 NM;ADJUSTMENT SCREW INTERNAL HEX SIZE:0.1562 INCHES;LOCKNUT HEX SIZE:0.562 INCHES;LOCKNUT TORQUE:80-901 LBF IN.9-10 NM; IN; Part Name Assigned by Controlling Agency: PRESSURE RELIEF VALVE; Material: STEEL CORROSION RESISTING OVERALL. 2 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.