The Piston,compressor, cataloged under National Stock Number 4310-01-040-0318, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-01-040-0318 |
| Item Name | Piston,compressor |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Status | ACTIVE |
| Ring Groove Width | 0.095 INCHES NOMINAL AND 0.188 INCHES NOMINAL IN |
| Distance Between Pin Bosses | 1.063 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,AND NO.3 POSITIONS PISTON |
| Diameter | 2.620 INCHES NOMINAL IN |
| Ring Groove Diameter | 2.354 INCHES NOMINAL IN |
| Pin | NOT INCLUDED |
| Pin Type for Which Designed | FLOATING |
| Oil Groove | NOT INCLUDED |
| Head Style | DISH |
| Ring Groove Quantity | 3 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | NOT INCLUDED |
| Pinhole Diameter | 0.563 INCHES NOMINAL IN |
| Pin Hole Bushing | NOT 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 |
| Reference | Meaning |
|---|---|
| A-4-A | 5/9 Secondary reference Gardner Denver Inc. |
| P2014B | 3/9 Design control — primary reference Gardner Denver Inc. |
NSN 4310-01-040-0318 is a Piston,compressor, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5120-01-109-8202, 4820-01-282-4992. Verify interchangeability with system specifications before substitution.
Key specifications for 4310-01-040-0318: Overall Height: 2.375 INCHES NOMINAL IN; Ring Groove Width: 0.095 INCHES NOMINAL AND 0.188 INCHES NOMINAL IN; Distance Between Pin Bosses: 1.063 INCHES NOMINAL IN; Integral Connecting Rod: NOT INCLUDED. 20 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.