The Valve Pilot Operated, cataloged under National Stock Number 2520-00-401-0604, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2520-00-401-0604 |
| Item Name | Valve Pilot Operated |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Status | ACTIVE |
| General Characteristics Item Description | VALVE SHALL BE A 4-WAY 2 POSITION SPRING OFFSETPILOT OPERATED VALVE WITH 1 SPOOL,ALL PORTS TO BE STRAIGHT THREAD O RINGS BOSS CONNECTED IN ACCORDANCE WITH SAE J514; WORKING PRESSURE 220 PSI; PROOF PRESSURE 440 PSI; TEMPERATURE -50 DEGREE TO 225 DEGREE FAHRENHEIT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 484331 | 5/9 Secondary reference American Hoist and Derrick Co |
| 13216E9545 | 5/2 Secondary reference U.S. Government activity |
| 6810-D03-10 | 5/9 Secondary reference Dynex/rivett Corp Power Units and Systems |
| 6810-D03-10 | 3/9 Design control — primary reference Dynex/rivett Inc. |
| 6810-01-73 | 5/9 Secondary reference Dynex/rivett Corp Power Units and Systems |
| 6810-09FS61 | 5/9 Secondary reference Dynex/rivett Corp Power Units and Systems |
NSN 2520-00-401-0604 is a Valve Pilot Operated, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-00-486-2784. Verify interchangeability with system specifications before substitution.
Key specifications for 2520-00-401-0604: General Characteristics Item Description: VALVE SHALL BE A 4-WAY 2 POSITION SPRING OFFSETPILOT OPERATED VALVE WITH 1 SPOOL,ALL PORTS TO BE STRAIGHT THREAD O RINGS BOSS CONNECTED IN ACCORDANCE WITH SAE J514; WORKING PRESSURE 220 PSI; PROOF PRESSURE 440 PSI; TEMPERATURE -50 DEGREE TO 225 DEGREE FAHRENHEIT. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.