List of screw drives

Square Driver Set

The description of the Pozidriv head applies also to Supadriv. You can help by adding to it. Despite the similar naming scheme to metric fasteners, there is no correlation between the name of the size and the dimensions of the tool. Other combinations are a Phillips and Robertson, a Robertson and a slotted, a Torx and a slotted and a triple-drive screw that can take a slotted, Phillips or a Robertson. The slot was closed on the ends to prevent the flat-blade tool from slipping out sideways and damaging nearby electronics.

Grey Pneumatic 1010PP Socket

Compared to Allen hex sockets, the advantages of these bolts include higher torque capability and the lack of a recess to trap water. There are various other ways to categorize screw drives.

Both the tool and the socket have a slight taper. It was the first type of screw drive to be developed, and for centuries it was the simplest and cheapest to make. They are intended to be tightened and loosened by hand, and not found in structural applications.

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It is used on fast food promotional toys and video games, die-cast toys, and some Roomba battery packs. It is used primarily in the automotive industry in high-torque applications, such as brakes and driveshafts. Its primary advantage over older screw drives is that it resists cam out.

Square Drivers

For this reason Bristol screw drives are often used in softer, non-ferrous metals. Linear broaching to cut corners into a drilled hole similar to the action of a mortising machine for woodworking has also been used less commonly over the decades. One-way screws are special screws that can be turned only in one direction. External drives are characterized by a female tool and a male fastener. As a result, the Pozidriv is less likely to cam out.

The internal-wrenching square socket drive for screws as well as the corresponding triangular socket drive was conceived several decades before the Canadian P. An earlier patent covering both square-socket- and triangle-socket -drive wood screws, rtlh86.sys driver for windows mac U.

Square Drive Socket

Their rise to popular use has been in spite of the fact that neither a flat screwdriver or Pozidriv screwdriver are fully successful in driving these screws to the required torque. It is used for security as the drivers are uncommon. This can also prevent attempts at turning the screw with a small flat-bladed screwdriver.

Square Drive Sockets

Today, cold forming by stamping in a die is still the common method used for most screws sold, although rotary broaching is also common now. Drive blades are about equal thickness. It typically consists of a countersunk flat-head bolt, with a thin shank and hex head protruding from the flat head. One-way screws are practical only when the need for removal is unlikely. The spline drive was part of the obsolete, U.

These screws can be driven with standard Robertson bits. Standard point hex socket bits and wrenches fit these screws.

Square driver set

Square Drivers

Triple-square drive fasteners have been used in high-torque applications, such as cylinder head bolts and drive train components. The hex drive is better than square drive for locations where surrounding obstacles limit wrenching access, because smaller wrench-swing arcs can still successfully rotate the fastener. The shape resembles triple square and spline screw drives, but they are incompatible. In practice, drivers for the fasteners may or may not interchange, but should be examined carefully for proper fit before application of force. An External Torx version exists, where the screw head has the shape of a Torx screwdriver bit, and a Torx socket is used to drive it.

Torq-set is a cruciform screw drive used in torque-sensitive applications. In Torq-set however, the lines are offset from each other, so they do not align to form intersecting slots across the top of the head.

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