Combination of screw refers to the combination of small head screw, is written by a pan head screw with a pad and three ball pad assembly. Here play flat mat is specially used for combination screw, on the market is not our usual ordinary flat mat.
And it is the combination screw flat mat thickness is commonly according to the size of the combination screw specification to order, such as combination of M3 screws, flat mat thickness is 0.8, also has a thick, flat pad diameter is also such;
For example, the flat size of the M4 assembly screw, the national standard is 9 big, also has 8 big, this is to see the customer's demand.
Combination and pan head screws is refers to the combination of big pan head screws, head size is larger than of the head of a small head, thickness is thicker, flat pad diameter, size, thickness and small head screw is the same.
