CSK Flat Head Self Drilling Screw (SS304) Hangzhou Huachao Fastener Co., Ltd. Base Info Trademark:HANGCHAOSpecification:DIN7504POrigin:ChinaHS Code:73181400 Description Pre:Uss Flat Washer Uss # 8 #10 Flat Washer Next:Metal Rings for Curtains (RS09)