Cheat Guide Chart – Bolts, Screws, Washers, Nuts, Drive Charts Working on a project and trying to find the name of a special bolt type ? We have the charts to help you identify the many different types of bolts and screws for just about any project. Parts of a typical screw . Screw Head Types . The Screw head provides two main functions; firstly it is the stopping point for the screw once it has been driven on to the surface that you are fixing. The second is to house the drive , or the means by which force is applied to drive the screw in … Feb 21, 2019 Driving Methods. A hex socket screw or Allen screw requires the use of an Allen wrench, which has a hexagonal shaft that is inserted into the recession in the screw head . The other type of hex screw has an entire head that is hexagonally shaped. A wrench set, socket wrench or adjustable wrench is required for driving hex screws.

Wood screws are classified by the type of drive, the shape of head , its length, and whether it is designed for wood or metal; this page refers to wood screws only. Types of Drives Driver refers to the indented shape on the screw head used to turn the screw . The slot screw drive has a single slot in the fastener head and is driven heremon blade or flat-bladed screwdriver . It was the first type of screw drive to be developed, and for centuries it was the simplest and cheapest to make. heremon drives, it is straightforward to manufacture a slot head or drive by hand. A socket cap screw , also known as a socket head capscrew, socket screw , or Allen bolt, is a type of cap screw with a cylindrical head and hexagonal drive hole. The term socket head capscrew typically refers to a type of threaded fastener whose head diameter is nominally 1.5 times that of the screw shank ( major) diameter,.