The Disk,valve, cataloged under National Stock Number 4820-00-334-9344, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Disk,valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Engine Systems, Inc. Dba Marine Systems Div Marine Systems, Inc. (CAGE 6Y051); Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc (CAGE 39VG9) |
| Parameter | Value |
|---|---|
| NSN | 4820-00-334-9344 |
| Primary Part Number | 5235602 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 5235602 | Engine Systems, Inc. Dba Marine Systems Div Marine Systems, Inc. (USA) |
| 5235602 PRIMARY | Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc (USA) |
| Reference | Meaning |
|---|---|
| AVP10S41-0493PC4H75DEGM10217 | 5/9 Secondary reference Naval Sea Systems Command |
| AVP10S41-0493PC4H75DEGM10217 | 5/9 Secondary reference U.S. Government activity |
| 5235602 | 5/9 Secondary reference American Collection Systems Inc Dba Pixie Dust Services |
| N6064PC40 | 5/9 Secondary reference General Motors Corp Electro-Motive Div |
| 9582657 | 5/9 Secondary reference General Motors Corp Electro-Motive Div |
| 5226950 | 5/9 Secondary reference General Motors Corp Electro-Motive Div |
| 5235602 | 5/9 Secondary reference General Motors Corp Electro-Motive Div |
| N6064PC40 | 5/9 Secondary reference General Motors Corp |
| AVP10S41-0493PC40 | 5/9 Secondary reference Naval Sea Systems Command |
| 5226950 | 5/9 Secondary reference General Motors Corp |
| AVP10S41-0493PC40 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-00-334-9344 is a Disk,valve, manufactured by Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-334-9344 has 2 manufacturer part numbers on file: 5235602 (Engine Systems, Inc. Dba Marine Systems Div Marine Systems, Inc.), 5235602 (Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc).
1 possible match (shared part number, not a government interchangeability claim): 7690-01-653-8821. 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.