The Hager Fastener Engineering team recently released an iphone special online thread calculator version 2.0 in the Apple online store, which is free for industry engineers and professionals to download and use. The traditional and complicated thread data sheet and thread manual have been omitted, making it easier and faster for users to refer to the calculated thread data. The calculator has English/American metric screw threads and ISO metric and special thread data, as well as standard UNC, UNF, UNEF, BSW, BSF and metric thickness thread data. It also includes tapping bit size data, as well as fully customizable thread styles, shank selection and thread combinations in UN, Imperial and Metric standards. 25-50Mm Calcium Carbide,25-50Mm Chemical Formula Calcium Carbide,Calcium Dicarbide,25-50Mm Anhydrous Calcium Chloride shizuishan pengsheng chemical co.,ltd , https://www.szspschem.com