Fish bolt:Mechanical parts,cylindrical threaded fasteners for nuts.A fastener consisting of two parts,head and screw(cylinder with external thread),used in conjunction with a nut to fasten together two parts with a through hole.This connection method is called fish bolt connection.If the nut is unscrewed from the fish bolt,the two parts can be separated,so the fish bolt connection is a detachable connection.
According to the connecting force method,it is divided into general and hinged holes.According to the shape of the head:hexagonal head,round head,square head,heavy head and so on.In between the hexagonal head is the most commonly used.Generally,the countersunk head is used where the connection is required.
Riding fish bolt English name is U-bolt,non-standard parts,U-shaped shape,so also known as U-shaped fish bolt,both ends of the thread can be combined with the nut,mainly used to fix the pipe such as water pipe or sheet such as car spring,because the method of fixing objects like people riding in the same,so called riding fish bolt.According to the thread length,it is divided into full thread and non-full thread.
The tooth type of the thread is divided into coarse teeth and fine teeth.The coarse teeth type is not shown in the mark of the fish bolt.
Fish Bolts can be divided into 3.6,4.8,5.6,6.8,8.8,9.8,10.9 and 12.9 grades according to their functional grades,among which the raw material of fish
Bolts above 8.8(including 8.8)is low carbon alloy steel or medium carbon steel and has been heat treated(quenching+tempering),generally known as high strength fish bolts.Class 8.8 and below(excluding Class 8.8)general name fish bolt.
