Disc spring manufactured from 1075 Steel with an inside diameter of 0.406 Inch and an outside diameter of 0.618 Inch.
                                
                    | Label | Value | 
|---|---|
| Ball Bearing Size | R-4 | 
| Brand | Maryland Precision Spring | 
| Deflection at 75% Height | 0.009 in | 
| Display Name | AK-R4 | 
| Finish | Phosphate | 
| Inside Diameter | 0.406 in | 
| Load at 75% Height | 6.8 lb | 
| Material | 1075 Steel | 
| Measurement Units | Standard | 
| Outside Diameter | 0.618 in | 
| Outside Height | 0.022 in | 
| SKU | AK-R4 | 
| T | 0.01 in | 
| Label | Value | 
|---|---|
| Ball Bearing Size | R-4 | 
| Brand | Maryland Precision Spring | 
| Deflection at 75% Height | 0.23 mm | 
| Display Name | AK-R4 | 
| Finish | Phosphate | 
| Inside Diameter | 10.31 mm | 
| Load at 75% Height | 3.08 kg | 
| Material | 1075 Steel | 
| Measurement Units | Standard | 
| Outside Diameter | 15.7 mm | 
| Outside Height | 0.56 mm | 
| SKU | AK-R4 | 
| T | 0.25 mm |