How to measure the truss head self tapping screws?

Large truss head self tapping screws can be produced with reference to many standards. When measuring screws, what is the national standard for determining a product?

National standard? German standard? Japanese standard? American Standard? British standard? ISO standard, or other? Many products, many standards, can pass, that is to say, they are similar to the size specifications of a certain product, only a certain two specifications will be different, and the tolerance range is a little different. Or the size of the non-standard screw custom screws will be slightly different.

There are usually two methods for measuring the truss head self tapping screws.

If it is an external thread, the general size can directly measure the rib outer diameter with the vernier caliper, you can know how big the size of the screw. The length of the screw generally refers to the length of the thread, excluding the height of the head. The diameter and height of the head of the truss head self tapping screws can be measured separately with a caliper.

If it is a truss head self tapping screw with strict requirements on dimensional precision, the vernier caliper can be used for measurement.

If you want to custom truss head self tapping screws, please feel free to contact us at annie.li@szsst88.com

Skype: kalyn qin M: +86 18124507113 Tel: +86 0755-85296744 Email: annie.li@szsst88.com Add: No. 11, Dinghou Road, Dongfang Community, Songgang Street, Baoan District, Shenzhen, Guangdong, China