The Piston,valve, cataloged under National Stock Number 4820-01-238-4213, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Fairbanks Morse, Llc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-238-4213 |
| Primary Part Number | AL20626B |
| Item Name | Piston,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Fairbanks Morse, Llc |
| Status | ACTIVE |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| AL20626B | Curtis Engine & Equipment Company, Inc. Dba Curtis Engine & Equipment (USA) |
| AL20626B PRIMARY | Fairbanks Morse, Llc (USA) |
| AL20610E ITEM 34 | Fairbanks Morse, Llc (USA) |
| Reference | Meaning |
|---|---|
| AL20610E | D/9 Drawing number reference only Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco |
| AL20610E ITEM 34 | 5/9 Secondary reference Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco |
| AL20626B | 3/9 Design control — primary reference Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco |
NSN 4820-01-238-4213 is a Piston,valve, manufactured by Fairbanks Morse, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-238-4213 has 3 manufacturer part numbers on file: AL20626B (Curtis Engine & Equipment Company, Inc. Dba Curtis Engine & Equipment), AL20626B (Fairbanks Morse, Llc), AL20610E ITEM 34 (Fairbanks Morse, Llc).
Key specifications for AL20626B: Material: STEEL CORROSION RESISTING. 1 specification is 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.