Shoulder Screw Chart – Shenzhen Shi Shi Tong

There are many standard screws, depending on the country, the standard number is called the same. So what is the difference between the shoulder screw chart and the standard number? ISO7379 Cap Head Hexagon Socket Shoulder Screw Chart d1 f9 d2 l1 +0,25 d3 l2 l3 A/F 4 M 3 4 5 6 8 10 12 16 20...