... , Heat treatment, Plating, Anti-slipping patchCategory: 1. by components Bolts, Screw bolts/Studs, Nuts, Tapping screws, Wooden screws, Washers/Gaskets, Check ... , Truss, Button, PF, Pan washer, Cheese, Countersunk, Fillister, hexagon, Hexagon washer head, Hexagon socket button head and etc. 3. by type of drive ... and good service.www.jielimetal.com.cn Cross Recessed Round Head Screw Bolt JL-SCR-100