What Is A Torx Screw

Posted on 31/08/22

A traditional slot-head screw requires a flat-bladed screwdriver to remove it, and a cross-head screw requires a Phillips or Pozidriv screwdriver to remove it. In fact, we all are familiar with both types of screws. As well as these screw types, there are also many other specialised screw types such as Torx screws that are available.

What is a Torx Screw?

In 1967, Camcar Textron developed a screw head called a Torx, which has been a trademark. It was first used by Camcar Textron in 1967. The star-shaped head is held in place by a distinctive, six-point star-shaped pattern. It is often called a 'star screw', and the tightening and untightening of those screws is usually done by using a 'star screwdriver' with a 'star bit'. There are a wide variety of things that use Torx screws, including cars, motorcycles, bicycles, computers, hard drives, and consumer electronics such as cell phones. Despite having a star-shaped head, these screws are far more secure than the normal flat-head or cross-head screws due to their unusual shape. Additionally, they have a larger torque transmission range, which enables screws and bolts to be tightened more firmly.

Torx Screwdrivers

It is a Torx screwdriver that has a distinctive 6-point star-shaped head that is perfectly matched with appropriate screw heads with corresponding sizes. Compared to a traditional screw, the Torx screwhead has a unique design, which means there is less chance of the screw head stripping or the screwdriver being damaged as a result. Because of the resilient design of Torx screwdrivers, they can last up to ten times longer than regular screwdrivers since they are so strong and durable. When using Torx screwdrivers, it is important to keep in mind that you must match the screwdriver size to the size of the Torx screw that you are using. You will need a T15 Torx screwdriver if you are working on screws that use Torx T15 threads since they are T15. There are a variety of sizes available in Torx screwdriver sets.

Security Torx

Due to the fact that each six-point star socket head has an additional pin at the centre of the component, Security Torx screws are often referred to as Pin Torx screws. Because of the centre pin, this type of fastening is impossible to use with a standard Torx screwdriver, therefore preventing tampering with it. In addition to Torx security screws, these screws are sometimes known as long six-lobed screws, tamper-proof torx, six-lobed pin torx, torx TR, star-pin drive torx screws or other names as well. There are a number of tamper-proof security Torx screws on the market that are more secure than standard Torx screws because of the specialized security Torx screwdriver that has to be used in order to remove them.

Security Torx Screwdrivers

The additional centre pin in the socket head of a security Torx screw requires a six-point torque screwdriver. This will not mate with the six-point torque screwdriver when taking off a security Torx screw. There are tools that can be used in order to use security Torx screws, which include additional security pins allowing them to be used.

5 Point Torx Plus

In 1990, Torx Plus was introduced, which was a version of the original Torx design introduced in the 1960s. With the help of this design, a higher torque could be applied while minimizing wear, resulting in increased productivity over the original design. Torx Plus is one of the first tooling systems to be tamper-resistant or Torx Plus Security. In addition, there is a variant called Torx Plus TR (tamper resistant). It is composed of a five-pointed star-shaped head socket with an outward pin arranged at the centre. In general, the pentalobular socket is a socket design with five points or five lobes and is considered to be a pentalobular design. A new design has been added to the current product offering to provide an even greater level of security, requiring the use of tools that mate with the new 5-point star socket and the centre locking pin.

Torx Screw Sizes

The size of the Torx screw or bolt socket head is important. This is because it will be used to fit the socket head of the Torx screw or bolt. In the following chart you will find a list of the standard Torx sizes that are used in industry.

Torx Size	Imperial Point to Point (inches)	Metric Point to Point	Max Torque Range
T1	.031"	.81mm	.02 to .03 Nm
T2	.036"	.93mm	.07 to .09 Nm
T3	.046"	1.10mm	.14 to .18 Nm
T4	.050"	1.28mm	.22 to .28 Nm
T5	.055"	1.42 mm	.43 to .51 Nm
T6	.066"	1.70 mm	.75 to .9 Nm
T7	.078"	1.99 mm	1.4 to 1.7 Nm
T8	.090"	2.31 mm	2.2 to 2.6 Nm
T9	.098"	2.50 mm	2.8 to 3.4 Nm
T10	.107"	2.74 mm	3.7 to 4.5 Nm
T15	.128"	3.27 mm	6.4 to 7.7 Nm
T20	.151"	3.86 mm	10.5 to 12.7 Nm
T25	.173"	4.43 mm	15.9 to 19 Nm
T27	.195"	4.99 mm	22.5 to 26.9 Nm
T30	.216"	5.52 mm	31.1 to 37.4 Nm
T40	.260"	6.65 mm	54.1 to 65.1 Nm
T45	.306"	7.82 mm	86 to 103.2 Nm
T50	.346"	8.83 mm	132 to 158 Nm
T55	.440"	11.22 mm	218 to 256 Nm
T60	.519	13.25 mm	379 to 445 Nm
T70	.610	15.51 mm	630 t0 700 Nm
T80	.690	17.54 mm	943 to 1048 Nm
T90	.784	19.92 mm	1334 to 1483 Nm
T100	.871	22.13 mm	1843 to 2048 Nm