Cross grooved disc head combination screws, also known as cross grooved circular head combination screws, or cross grooved semicircular head combination screws.
There is also a term for a cross grooved disc head screw, spring washer and flat washer assembly.
This product adopts 304 stainless steel wire, cold upsetting forming, and then set flat gasket for teeth rubbing.
Natural color after oil removal packing shipment
Dongguan Tiansheng Co., LTD., specializing in the development and production of non-standard fasteners for 12 years.
