The Piston,compressor, cataloged under National Stock Number 4130-00-970-1764, 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 Curtiss-Wright Electro-Mechanical Corporation Div Epd. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4130-00-970-1764 |
| Primary Part Number | 552044 |
| Item Name | Piston,compressor |
| FSC / FSG | 4130 / 41 — Refrigeration and Air Conditioning Components |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Ring Groove Width | 0.094 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 | SEMIFINISHED |
| Ring Groove Position and Quantity | NO. 1,NO. 2,AND NO. 3 POSITIONS PISTON |
| Diameter | 3.250 INCHES NOMINAL IN |
| Ring Groove Diameter | 2.938 INCHES NOMINAL AND 2.812 INCHES NOMINAL IN |
| Distance From Pin Hole Center to Extreme Top | 1.688 INCHES NOMINAL IN |
| Pin | INCLUDED |
| Pin Type for Which Designed | LOCKED |
| Oil Groove | NOT INCLUDED |
| Head Style | DISH |
| Ring Groove Quantity | 1 AND 2 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Ring | INCLUDED |
| Bushing Hole Diameter | 0.969 INCHES NOMINAL IN |
| Pin Hole Bushing | INCLUDED |
| Material | ALUMINUM |
| 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 |
|---|---|
| 552044 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| 552044 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4130-00-970-1764 is a Piston,compressor, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 4130, Refrigeration and Air Conditioning Components. Status: active.
NSN 4130-00-970-1764 has 1 manufacturer part number on file: 552044 (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
1 possible match (shared part number, not a government interchangeability claim): 4330-01-447-3960. Verify interchangeability with system specifications before substitution.
Key specifications for 552044: Overall Height: 3.875 INCHES NOMINAL IN; Ring Groove Width: 0.094 INCHES NOMINAL AND 0.156 INCHES NOMINAL IN; Distance Between Pin Bosses: 1.500 INCHES NOMINAL IN; Integral Connecting Rod: 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.