According to the high strength classification, the square head bolts can be divided into 4.8 class bolts, 8.8 class bolts, 10.9 class bolts and 12.9 class bolts.
According to the screw wire material, there are iron bolts and stainless steel bolts, stainless steel bolts have stainless steel SUS304 bolts, stainless steel SUS201 bolts, stainless steel SUS316 bolts.
This product adopts high carbon steel wire, cold upsetting extrusion molding, this is customized for customers, non-standard teeth and head shape, quadrilateral, rectangular, can be customized according to their own product structure.
The surface treatment is blackening + oil (oil is to prevent the product from rusting).
PE bag + carton packaging shipping.
Tiansheng has been specializing in customized non-standard production and development for 12 years. Welcome to customize the drawings/samples.
