The characteristic of the square neck bolt with half round head is that the head is made into a half round ball and a section of square neck is made below the head. A section of square hole should also be made accordingly on the connecting piece connected with this kind of bolt.
Insert the bolt into the coupling and screw on the nut. The bolt will not rotate due to the square neck.
Using carbon steel wire, cold heading process production + high speed wire rolling machine.
Surface roughness Ra3.2, machining tolerance +/-0.05.
The surface treatment is green blue zinc with no red rust after 96H salt spray.
PE bag + carton packaging shipping.
Tiansheng company specializes in r&d and production of non-standard fastening customized products for 12 years. You are welcome to customize products with drawings or samples.