The Piston,compressor, cataloged under National Stock Number 4310-00-841-9902, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Atlas Copco Holyoke Inc. Government technical data includes 23 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4310-00-841-9902 |
| Primary Part Number | PST-446A |
| Item Name | Piston,compressor |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Atlas Copco Holyoke Inc |
| Status | ACTIVE |
| FSC Application Data | AIR COMPRESSOR |
| Ring Groove Width | 0.1875 INCHES MINIMUM AND 0.1885 INCHES MAXIMUM AND 0.026 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN |
| Distance Between Pin Bosses | 2.375 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 | 4.4977 INCHES NOMINAL IN |
| Ring Groove Diameter | 4.016 INCHES NOMINAL AND 4.056 INCHES NOMINAL IN |
| Distance From Pin Hole Center to Extreme Top | 2.123 INCHES MINIMUM AND 2.127 INCHES MAXIMUM IN |
| Pin | INCLUDED |
| Pin Type for Which Designed | FLOATING |
| Oil Groove | NOT INCLUDED |
| Head Style | DOME |
| Ring Groove Quantity | 4 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | NOT INCLUDED |
| Pinhole Diameter | 1.250 INCHES NOMINAL IN |
| Pin Hole Bushing | NOT INCLUDED |
| Material | IRON CAST |
| 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 |
|---|---|
| PST00446A | Atlas Copco Holyoke Inc (USA) |
| PST-446A PRIMARY | Atlas Copco Holyoke Inc (USA) |
| Reference | Meaning |
|---|---|
| 1759N | 5/9 Secondary reference U.S. Government activity |
| HL17832PC36-38 | 5/9 Secondary reference U.S. Government activity |
| PST446A | 5/9 Secondary reference U.S. Government activity |
NSN 4310-00-841-9902 is a Piston,compressor, manufactured by Atlas Copco Holyoke Inc, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-00-841-9902 has 2 manufacturer part numbers on file: PST00446A (Atlas Copco Holyoke Inc), PST-446A (Atlas Copco Holyoke Inc).
Key specifications for PST-446A: Overall Height: 4.123 INCHES MINIMUM AND 4.127 INCHES MAXIMUM IN; FSC Application Data: AIR COMPRESSOR; Ring Groove Width: 0.1875 INCHES MINIMUM AND 0.1885 INCHES MAXIMUM AND 0.026 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN; Distance Between Pin Bosses: 2.375 INCHES NOMINAL IN. 23 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.