Generally, there are five series of 2.43.24.8, 5, 6.4. The length of nail core is 11 series. 6-8 -- 8.5 -- 9.5 -- 11 -- 12.5 -- 13 -- 14.5 -- 15.5 -- 16 -- 18 -- 21. In China, the odd number is more than in foreign countries. Generally, the current technology with the length of 22 -- 25 -- 30 -- 40 stainless steel material of 3.2 diameter can be 16mm long (it is seen that some manufacturers have been making 3.2 * 20MM in the past few days, China There are 28mm long rivets outside, but I haven't seen them before.) 4 diameter rivets can be 25mm long, 4.8 diameter rivets can be 40mm long, but they are usually not used very much, and 30mm rivets are relatively few. 6.4 diameter rivets and 4.8 rivets can be almost 40mm long closed flat round head blind rivets (gb12615) market length can be increased by 5.56 length. At present, wire drawing rivets are generally 4.8 * 10 / 14 6.4* The 14 / 16 / 19 drawing rivets are of 6.4 * 14 / 17 / 19 / 21 single / double drum / multi drum dimensions, which are similar to the performance grade standard of general rivets. The performance grade is divided into 15 grades, namely 06 08 10 11 12 15 21 22 23 30 40 41 50 51. The open-end blind rivets are divided into two types, i.e. countersunk head and round head. Among them, the open-end blind rivets with performance grades of 10 and 11 are widely used. In 2006, the National Standards Committee revised and issued two national standards for open end blind rivets (GB / T 12617.1-2006, class 10 and 11) and open end blind rivets (GB / T 12618.1-2006, class 10 and 11). The two new standards, iso15978:2002 and iso15977:2002, were issued on July 5, 2006 and formally implemented on December 1, 2006.