Socket Head Screw -

IS 1365 : Slotted Countersunk Flat Head Screws slot head screw Socket Cap Head This type of screw has a cylindrical shaped head with a hex recess that can be tightened with a socket wrench driver It is slot vip 999 Slotted 90°Countersunk Head Screws with W & F Threads BS 450 - 1958 Display drawing: 英标BS 450

slot mermaids millions fiable Slotted screw heads have a single horizontal indentation referred to as the slot The fastener head is driven by a “common blade” or flat-bladed screwdriver