Hengbo Hardware Stock Sales Slot Screws KFH-M3 Manufacturer - Phone - Price Detailed Content by Phone 13410536307 Jing Manager. Manufacturer Direct Supply of Stainless Steel or Carbon Steel Rivet Screws, Rivet Nuts: FH, FHS, FHA, TFH, TFHS, HFH, HFHS, FHL, FHLS, etc., other specifications. Manufacturer Direct Supply Stainless Steel Rivet Screws Rivet Nuts 1/4-20 Threaded Screws American Rivet FHS-0420-L Fasteners