Download or read book GB/T 820-2015 Translated English of Chinese Standard (GBT 820-2015, GB/T820-2015, GBT820-2015) written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2017-02-27 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: This standard specifies the type and size, technical condition and marking of the raised countersunk head screws with cross recess. This standard applies to the type H and type Z raised countersunk head screws with cross recess of the thread specification M1.6 ~ M10, the performance level of 4.8, A2-50, A2-70, CU2, CU3 and AL4, AND the product grade A.