The Piston,valve, cataloged under National Stock Number 4810-01-423-5107, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Allied Systems Company Dba Allied Systems Co. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4810-01-423-5107 |
| Primary Part Number | 25905 |
| Item Name | Piston,valve |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Allied Systems Company Dba Allied Systems Co |
| Status | ACTIVE |
| Outside Diameter | 0.620 INCHES NOMINAL IN |
| Inside Diameter | 0.250 INCHES NOMINAL IN |
| Valve Design Control Activity | 60848 |
| 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 |
|---|---|
| 25905 PRIMARY | Allied Systems Company Dba Allied Systems Co (USA) |
NSN 4810-01-423-5107 is a Piston,valve, manufactured by Allied Systems Company Dba Allied Systems Co, classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-01-423-5107 has 1 manufacturer part number on file: 25905 (Allied Systems Company Dba Allied Systems Co).
Key specifications for 25905: Outside Diameter: 0.620 INCHES NOMINAL IN; Overall Length: 0.875 INCHES NOMINAL IN; Inside Diameter: 0.250 INCHES NOMINAL IN; Valve Design Control Activity: 60848. 3 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.