General purpose bolts: Non-standard bolts are processed in a wide variety, divided into hexagonal head and square head. Hexagon head bolts are more commonly used and are divided into A, B and C waiting product grades according to manufacturing accuracy and product quality, with A and B grades being used more often, and are used crucially in important areas with high assembly accuracy, high impact, vibration or variable load. According to the head support area and installation location specifications, hexagonal head bolts can be divided into hexagonal head and large hexagonal head; non-standard embossed screws should be selected when the head or screw has the type of hole needs to be stuck. Square head bolts have a larger square head size and stress surface, making it easier for the wrench mouth to snap or rely on other parts to initiate the rotation effect. It is usually used in rough structures and sometimes in T-slots to allow the bolt to loosen and adjust the position in the slot.
●Reaming bolt: The bolt is inserted tightly into the reamed hole when used to prevent the workpiece from shifting.
●Turn stop bolt: Square neck with tenon.
●Special purpose bolts: Including T-slot bolts, live joint bolts and ground bolts. t in the area that needs to be disassembled frequently in the area that needs to be disassembled and connected frequently; cement foundation fixing frame or motor base using ground bolts.
● Non-standard bushing processing adopts high toughness bolting of steel structure: generally used for friction connection of steel structures such as buildings, bridges, towers, pipe supports and lifting equipment
