Dimension accuracy class of plastic product SJ1372-78Nominal dimensionAccuracy Class12345678Tolerance of dimensionNote: 1、This standard is made up with 8 classes from the first to the eighth; 2、This standard only stipulate tolerance, and up-down tolerance can be confirmed according to actual demands; 3、Non-marked dimension used the 8th accuracy tolerance of dimension; 4、Standard measure temperature is from 18 to 22, relative humidity:60%-70%(measure after product made for 24 hours)Choice for Accuracy Class of Plastic ProductItemName of materialsAccuracy ClassHighNormalLow1PS/ABSPMMA/PC/ polysulfone/PO/ bakelite/ amino plastic/ 30% glass fibre reinforced plastics3452PA6/PA66/PA610/PA9/PA1010/hard PVC/ chlorinated polyether4563POM/PP/HDPE5674LDPE/soft PVC678