slotted types: flat head ,countersunk head, round body, Material: steel.... flat head slotted rivet nutWe use cold forged ... and other fittings of industrial products. types: flat head ,countersunk head, round body, hex body, open end, ... M8 ,Material: steel, stainless steel, brass,aluminium. We specilize in producing it . And have productive experience for many years. flat head slotted rivet nut ...