What does a socket head cap screw look like?

A socket cap screws are machine screws with a cylindrical barrel shaped head containing a hexagonal socket. The head has a smaller diameter than most other machine screw heads, typically just 1.5 times the nominal thread diameter.

What is an SHC screw?

Socket head cap screws are commonly used in machine assembly for removable panels and parts. They have a round cap with a hex head and are tightened with a socket wrench drive.

Is a socket head cap screw a bolt?

A socket cap screw, also known as a socket head cap screw, socket screw, or Allen socket bolt, is a type of cap screw with a cylindrical head and hexagonal drive hole. They are typically driven with a socket wrench or Allen hex key and usually have knurled heads.

How do you measure a head cap screw?

Length is measured from the point at which the head sits flat with the surface, to the tip of the threads. Hex, pan, truss, button, socket cap, and round head screws are measured from right under the head to the end of the threads. Flat head screws are measured from the top of the head to the tip of the threads.

What material is a socket head cap screw?

alloy steel
Always check the head marking and replace metric socket head cap screws with the same Property Class. The most common materials are alloy steel, 18-8 and 316 stainless steel. Other materials include nickel-copper (NI-CU) alloy and silicon bronze.

What is Fillister head screw?

A Fillister head machine screw, sometimes called a cheese head screw, is similar to a Pan head machine screw but with greater side height. Fillister head screws are the preferred head type for counterbored holes. They are similar to a Pan head machine screw but with greater side height.

Do cap screws need nuts?

The most basic difference between a cap screw and a bolt is the way in which these fasteners are installed. Technically, a bolt is installed by turning a nut to tighten the fastener, while a cap screw in installed by turning the head of the bolt to assemble and tighten.

What grade are standard socket head cap screws?

12.9 grade
The most common standard Socket Cap Screw is to DIN 912 in 12.9 grade, also available in 8.8 and 10.9 and in A2 and A4 stainless steel.

What is hex head cap screw?

A hex cap screw is a threaded fastener with a hexagonal-shaped head. While the term hex head screw is generally used interchangeably with hex bolt, these two fasteners are actually very different. Hex screws are typically smaller than hex bolts, but this is not always the case. A hex cap screw can be significantly larger than a hex bolt

What are socket head screws?

With a deeper drive than flat and rounded head screws, socket head screws withstand more torque for a tighter hold. Install in a counterbored hole or above the surface. A domed head sits above the surface of your material. Includes screws such as pan, button, binding, and truss head screws.