The Piston,compressor, cataloged under National Stock Number 4310-00-437-6925, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-00-437-6925 |
| Item Name | Piston,compressor |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Status | ACTIVE |
| Ring Groove Width | 0.093 INCHES NOMINAL AND 0.156 INCHES NOMINAL IN |
| Distance Between Pin Bosses | 1.500 INCHES NOMINAL IN |
| Integral Connecting Rod | INCLUDED |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | FINISHED |
| Ring Groove Position and Quantity | NO. 1,NO. 2,NO. 3 POSITIONS PISTON |
| Oil Passage Type | SLOT |
| Diameter | 3.250 INCHES NOMINAL IN |
| Ring Groove Diameter | 2.930 INCHES NOMINAL IN |
| Distance From Pin Hole Center to Extreme Top | 2.250 INCHES NOMINAL IN |
| Pin | INCLUDED |
| Pin Type for Which Designed | LOCKED |
| Oil Groove | INCLUDED |
| Head Style | CONCAVE |
| Ring Groove Quantity | 3 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | INCLUDED |
| Pinhole Diameter | 0.750 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 |
|---|---|
| RSK234 | 5/9 Secondary reference Lodestone Corp Div of Fedders Corp |
| RSK234A | 3/9 Design control — primary reference Lodestone Corp Div of Fedders Corp |
| RSK234 | 5/9 Secondary reference Fedders North America Inc |
NSN 4310-00-437-6925 is a Piston,compressor, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
Key specifications for 4310-00-437-6925: Overall Height: 3.875 INCHES NOMINAL IN; Ring Groove Width: 0.093 INCHES NOMINAL AND 0.156 INCHES NOMINAL IN; Distance Between Pin Bosses: 1.500 INCHES NOMINAL IN; Integral Connecting Rod: 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.