The Piston,compressor, cataloged under National Stock Number 4310-00-871-2178, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-00-871-2178 |
| Primary Part Number | 8642X |
| Item Name | Piston,compressor |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor |
| Status | ACTIVE |
| Ring Groove Width | 0.125 INCHES NOMINAL IN |
| Distance Between Pin Bosses | 1.781 INCHES NOMINAL IN |
| Integral Connecting Rod | NOT INCLUDED |
| Retaining Ring Groove | NOT INCLUDED |
| Surface Finish | FINISHED |
| Ring Groove Position and Quantity | NO.1,NO.2,NO.3 PISTON |
| Oil Passage Type | HOLE |
| Diameter | 5.250 INCHES NOMINAL IN |
| Ring Groove Diameter | 4.813 INCHES NOMINAL IN |
| Distance From Pin Hole Center to Extreme Top | 4.000 INCHES NOMINAL IN |
| Pin | INCLUDED |
| Pin Type for Which Designed | LOCKED |
| Oil Groove | INCLUDED |
| Head Style | HUMP |
| Ring Groove Quantity | 4 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | INCLUDED |
| Bushing Hole Diameter | 0.625 INCHES NOMINAL IN |
| Pin Hole Bushing | INCLUDED |
| Material | ALUMINUM ALLOY |
| 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 |
|---|---|
| 8642X PRIMARY | Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor (USA) |
| Reference | Meaning |
|---|---|
| 2007X2 | 5/9 Secondary reference Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor |
NSN 4310-00-871-2178 is a Piston,compressor, manufactured by Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-00-871-2178 has 1 manufacturer part number on file: 8642X (Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor).
Key specifications for 8642X: Overall Height: 4.875 INCHES NOMINAL IN; Ring Groove Width: 0.125 INCHES NOMINAL IN; Distance Between Pin Bosses: 1.781 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.