This standard specifies slotted pan head screws with thread specifications M1.6~M10, performance grades 4.8, 5.8, A2-50, 2-70, CU2, CU3 and AL4, and product grade A. If other technical requirements are required, they should be selected from current standards (such as GB/T 196, GB/T 3106, GB/T 3098.1, GB/T 3098.6, GB/T 3098.10 and GB/T 3103.1).