【提示：请检查传入的文本是否正确 】

L-shaped ground bolts, buried in concrete foundations, for fixing the base of various machines and equipment.
 

U-shaped bolts are named after their U-shaped shape and are threaded at both ends to allow them to be combined with a nut. They are mainly used for fixing tubular objects such as water pipes or leaf-shaped objects such as leaf springs in cars.
 

T-shaped bolts are suitable for occasions where the bolt can only be connected from one side of the part being connected. Insert the bolt from the T-slot and then turn 90°, so that the bolt can not be taken out; also used in the occasion of compact structure requirements.
 

The head of the countersunk head square neck bolt, a 90 degree cone, is similar to the common countersunk head bolt, with tool tightening slots in the head in the form of a zigzag, cross, hexagonal, etc. On the surface of the mounting hole in the connection, a 90 degree conical nub is machined and the head of the countersunk square neck bolt is inside this nub, flush with the surface of the connection.
 

Common half-round head bolts are used on metal parts, large half-round head bolts are used on wooden parts, and reinforced half-round head bolts are used on occasions subject to shock, vibration or alternating loads.
 

Square head bolts have a large square head size, which makes it easy to jam with a spanner or rely on other parts to act as a stopper; they can also be used in parts with T-slots to adjust the bolt position.