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What is the difference between a tap bolt and a cap screw?

Tap bolts and cap screws are differentiated by their installation method and their form. Tap bolts have a hexagonal head shape and a fully threaded shaft. They are installed by turning the nut. Cap screws may have a cylindrical head and a recessed drive, but they are sometimes hex-shaped. They are installed by turning the head. Cap screws are usually partially threaded.

What is a hex tap bolt?

A hex tap bolt is an industrial-grade threaded fastener. It is meant to fasten connections in various applications, including those that are structural and equipment based. These bolts are comparable with standard hex bolts but for their fully-threaded shaft and a machine thread design that fits with tapped holes or a nut.

What do hex tap bolts look like?

bolts look like? Hex tap bolts are very similar in appearance to standard industrial bolts. They have a flat-topped, hexagonal head. This feature makes it easy to tighten in place with a hex wrench. When paired with a nut, they can be installed from the nut side, but they are mainly used in tapped holes. They feature machine threading across their length.

What are tap bolt dimensions?

The standard dimensions of hex tap bolts include diameters that range from 1/4 inch to 3/4 inch across the thickness of the threaded portion. The length of this same portion will range from 3/4 inch to 6 inches. Some tap bolts may exceed these ranges. As with all bolts, a shorter length and thicker diameter will amount to a bolt with greater load capacity.

What are tap bolt applications?

Hex tap bolts are used in a wide range of industrial applications, including many structural and equipment settings. They are used in a similar manner as other types of hex bolts but in holes and parts that are tapped. They are most frequently used for vehicle repairs, adjusting tension in pulleys, and when attaching motors and other parts to machinery.

What are hex tap bolts made of?

Hex tap bolts are made from industrial-grade materials, with some variation based on their grade. Hex tap bolts used for lighter duty applications are most frequently made from low carbon steel. Tab bolts used for standard and heavy-duty applications are made from medium carbon steel, alloy steel, or weathering steel. These materials may have some degree of heat treating and other treatments that enhance resistance, such as stainless steel finishing and zinc-coating.

How should hex tap bolts be installed?

Hex tap bolts installation is completed with a hex wrench or similar tool, which can be used to tighten and adjust the bolt’s head or the nut. When tightening these bolts in place, two threads of the threaded portion should extend beyond the nut’s face. This will ensure full engagement with the nut.

How are hex tap bolts tightened?

Hex tapped bolts are meant to be installed into a tapped hole, which is internally threaded, or with the addition of a nut. The bolt is inserted into the parts that form a joint. If the parts are tapped, the bolt can be torqued from the head using a hex tool, such as a wrench. If a nut is used, the assembly can be fastened by torquing the nut.

How are hex tap bolts measured?

Hex tap bolt measurements are consistent with other types of hex-headed bolts. The measurement taken from directly below the head to the end of the threads is the length. This measurement indicates the depth the bolt will sit in the tapped hole. The thickness of the threads is the bolt’s diameter measurement, which should be compatible with the diameter of the tapped hole.

Do hex tap bolts need a washer?

As a general standard, hex tap bolts are paired with washers. This is done to add support, spacing, and integrity to the overall fastener assembly. Grade 5 and grade 8 hex tap bolts are usually paired with SAE hardened flat round washers. These washers are usually made from steel or stainless steel.