The Valve,safety Relief, cataloged under National Stock Number 4820-01-159-8604, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Meritor Heavy Vehicle Systems, Llc. Government technical data includes 8 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-159-8604 |
| Primary Part Number | RKN31200 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Meritor Heavy Vehicle Systems, Llc |
| Status | ACTIVE |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | STRAIGHT THRU |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.250 INCHES FIRST END IN |
| Thread Series Designator | NPTF FIRST END |
| Opening Pressure Setting | 150.0 POUNDS PER SQUARE INCH LBS |
| 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 |
|---|---|
| 25157376 | Volvo Group Government Sales Oceani Oceania Volvo Group Government Sales (AUS) |
| RKN31200 PRIMARY | Meritor Heavy Vehicle Systems, Llc (USA) |
| Reference | Meaning |
|---|---|
| 20QE1282 | 5/9 Secondary reference Volvo Group Government Sales Oceani Oceania Volvo Group Government Sales |
| 10026349 | 5/9 Secondary reference General Dynamics Land Systems - Force Protection Inc. Dba Gdls Div Gdls-Fp |
| 25157376 | 5/9 Secondary reference U.S. Government activity |
| K-500-CH-1772 | 5/9 Secondary reference Kovatch Corp. |
| 20QE2213 | 5/9 Secondary reference U.S. Government activity |
| 20QE1282 | 5/9 Secondary reference U.S. Government activity |
| 8235-RKN31200 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-159-8604 is a Valve,safety Relief, manufactured by Meritor Heavy Vehicle Systems, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-159-8604 has 2 manufacturer part numbers on file: 25157376 (Volvo Group Government Sales Oceani Oceania Volvo Group Government Sales), RKN31200 (Meritor Heavy Vehicle Systems, Llc).
Key specifications for RKN31200: Connection Style: PLAIN (PIPE) FIRST END; Connection Type: THREADED EXTERNAL PIPE FIRST END; Style Designator: STRAIGHT THRU; Thread Direction: RIGHT-HAND FIRST END. 8 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.