What is a Torx head cap screw?

What is a Torx head cap screw?

A Torx Key (6 Lobe) driven example of the more familiar Socket Head Cap Screw, these are a more modern alternative standard machine fastener to the standard hexagon headed bolt or setscrew, as found on much modern machinery. …

How are socket cap screws measured?

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. Oval head screws are measured from the beginning of the undercut on the head to the tip of the threads.

Where are Torx screws used?

Torx screws are typically used in vehicles, motorcycles, bicycles, computer systems, hard disk drives and consumer electronics. The unusual star-shaped head makes them far more secure than regular flat-head or cross-head screws and allows higher torque transmission so screws and bolts can be tightened more securely.

What material are socket head cap screws?

alloy steel
Socket Head Cap Screws are heavy duty screws made from DFARS sourced alloy steel. Manufactured in the USA by Parker Fasteners, these strong externally threaded screws offer the highest strength for commercial fasteners, and are the ideal fastener where there is not sufficient space for wrenches or sockets.

What grade are socket cap screws?

grade 12.9
Socket cap screws are often available in grade 12.9, meaning it has a UTS of 1200 MPa and will yield at 90% of this (1080 MPa).

How hard is a socket head cap screw?

The tensile strength is a minimum 180,000 psi for sizes 1⁄2′′ diameter and smaller and 170,000 psi for 5⁄8′′ diameter and above. Tensile strength may vary according to heat treatment and manufacturer.

Does machine screw length include head?

The nominal length of a screw is usually, though not always, measured from below the head to the tip of the screw. If no head exists, such as on a grub screw or threaded bar, the screw would be measured from end-to-end.

How do I know if my screws are standard or metric?

Telling the difference between a metric and imperial bolt is easy. If the bolt has lines on the head its standard or imperial. If the bolt has numbers on the head then its metric. These markings indicate how strong the bolt is they call this tensile strength.