There is a different to measure flat head screws and other head screws/bolts
1)Length for flat head screws:Head thickness+Thread length
2)Length for other head screws:Thread length
Contact: Mr.zhang
Phone: 18392741888
E-mail: info@intitanium.com
Add: No.1,Shigu Industrial Park,Baoji City,Shaanxi
Ciara
