The Piston,compressor, cataloged under National Stock Number 4130-01-117-2644, is classified within Federal Supply Class 4130 (Refrigeration and Air Conditioning Components) of the Refrigeration, AC, and Air Circulating Equipment group. The manufacturer of record is Hartford Compressors Inc. Government technical data includes 19 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4130-01-117-2644 |
| Primary Part Number | PST70A |
| Item Name | Piston,compressor |
| FSC / FSG | 4130 / 41 — Refrigeration and Air Conditioning Components |
| Manufacturer | Hartford Compressors Inc |
| Status | ACTIVE |
| Ring Groove Width | 0.125 INCHES NOMINAL IN |
| Distance Between Pin Bosses | 1.957 INCHES NOMINAL IN |
| Integral Connecting Rod | INCLUDED |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | FINISHED |
| Diameter | 2.187 INCHES NOMINAL IN |
| Distance From Pin Hole Center to Extreme Top | 0.812 INCHES NOMINAL IN |
| Pin | INCLUDED |
| Pin Type for Which Designed | FLOATING |
| Oil Groove | NOT INCLUDED |
| Head Style | FLAT |
| Ring Groove Quantity | 1 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | INCLUDED |
| Pinhole Diameter | 0.825 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 |
|---|---|
| PST70A PRIMARY | Hartford Compressors Inc (USA) |
NSN 4130-01-117-2644 is a Piston,compressor, manufactured by Hartford Compressors Inc, classified under FSC 4130, Refrigeration and Air Conditioning Components. Status: active.
NSN 4130-01-117-2644 has 1 manufacturer part number on file: PST70A (Hartford Compressors Inc).
Key specifications for PST70A: Overall Height: 1.755 INCHES NOMINAL IN; Ring Groove Width: 0.125 INCHES NOMINAL IN; Distance Between Pin Bosses: 1.957 INCHES NOMINAL IN; Integral Connecting Rod: INCLUDED. 19 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.