The Piston,compressor, cataloged under National Stock Number 4310-01-034-2995, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions. Government technical data includes 22 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-01-034-2995 |
| Primary Part Number | PST406 |
| Item Name | Piston,compressor |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| Status | ACTIVE |
| Ring Groove Width | 0.125 INCHES NOMINAL AND 0.188 INCHES NOMINAL IN |
| Distance Between Pin Bosses | 2.187 INCHES NOMINAL IN |
| Integral Connecting Rod | NOT INCLUDED |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | FINISHED |
| Ring Groove Position and Quantity | NO.1,NO.2,NO.3 AND NO.4 POSITIONS PISTON |
| Oil Passage Type | HOLE |
| Diameter | 4.875 INCHES NOMINAL IN |
| Ring Groove Diameter | 4.500 INCHES NOMINAL IN |
| Distance From Pin Hole Center to Extreme Top | 2.000 INCHES NOMINAL IN |
| Pin | NOT INCLUDED |
| Pin Type for Which Designed | LOCKED |
| Oil Groove | NOT INCLUDED |
| Head Style | FLAT |
| Ring Groove Quantity | 4 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | NOT INCLUDED |
| Bushing Hole Diameter | 0.812 INCHES NOMINAL IN |
| Pin Hole Bushing | INCLUDED |
| Material | ALUMINUM |
| Skirt Type | SOLID |
| 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 |
|---|---|
| PST406 PRIMARY | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| PST406 | 5/9 Secondary reference U.S. Government activity |
| PST406 | 5/9 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| PST406 | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
| PST-406 | C/1 Advisory reference — outside the item-of-supply concept Atlas Copco Holyoke Inc |
NSN 4310-01-034-2995 is a Piston,compressor, manufactured by Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-01-034-2995 has 1 manufacturer part number on file: PST406 (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions).
Key specifications for PST406: Overall Height: 3.500 INCHES NOMINAL IN; Ring Groove Width: 0.125 INCHES NOMINAL AND 0.188 INCHES NOMINAL IN; Distance Between Pin Bosses: 2.187 INCHES NOMINAL IN; Integral Connecting Rod: NOT INCLUDED. 22 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.