The Piston,compressor, cataloged under National Stock Number 4310-00-994-8944, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Leroi International Inc Dba Compair Leroi. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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 | 4310-00-994-8944 |
| Primary Part Number | 39201 |
| Item Name | Piston,compressor |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Leroi International Inc Dba Compair Leroi |
| Status | ACTIVE |
| Ring Groove Width | 0.094 INCHES NOMINAL IN |
| Distance Between Pin Bosses | 1.437 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 |
| Oil Passage Type | SLOT |
| Diameter | 3.000 INCHES NOMINAL IN |
| Ring Groove Diameter | 2.750 INCHES NOMINAL IN |
| Distance From Pin Hole Center to Extreme Top | 3.062 INCHES NOMINAL IN |
| Pin | NOT INCLUDED |
| Pin Type for Which Designed | LOCKED |
| Oil Groove | INCLUDED |
| Head Style | FLAT |
| Ring Groove Quantity | 3 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | INCLUDED |
| Bushing Hole Diameter | 0.875 INCHES NOMINAL IN |
| Pin Hole Bushing | INCLUDED |
| Material | STEEL |
| 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 |
|---|---|
| 39201 PRIMARY | Leroi International Inc Dba Compair Leroi (USA) |
| Reference | Meaning |
|---|---|
| 39201 | 3/9 Design control — primary reference Compair Kellogg Div of Robertshaw Controls Co |
NSN 4310-00-994-8944 is a Piston,compressor, manufactured by Leroi International Inc Dba Compair Leroi, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-00-994-8944 has 1 manufacturer part number on file: 39201 (Leroi International Inc Dba Compair Leroi).
6 possible matches (shared part number, not a government interchangeability claim): 5930-01-015-8853, 5342-01-081-5195, 4820-01-183-7157. Verify interchangeability with system specifications before substitution.
Key specifications for 39201: Overall Height: 5.500 INCHES NOMINAL IN; Ring Groove Width: 0.094 INCHES NOMINAL IN; Distance Between Pin Bosses: 1.437 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.