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What Is A Hex Cap Screw?

Hex cap screws get their name from their hexagonal heads. They sometimes have a washer face on the lower portion of the head. They are useful in many construction applications, especially when fasteners must meet precise engineering standards. They look very similar to six-sided construction bolts called hex bolts.

What Are The Advantages Of Hex Cap Screws?

Hex cap screws are often ideal fasteners in projects that must meet precise tolerances. They are installed with a wrench and can bear heavy loads. They typically have a washer face beneath the head that performs like a washer. Because the washer face distributes the force, a separate washer will not be needed.

What Are Hex Head Cap Screw Dimensions?

Hex head cap screws are sized by both diameter and length. Standard diameters range from 1/4 inch on the small end up to 3 inches. Standard lengths measure from 1-1/4 inches to 3-1/2 inches. Heavy hex head cap screws will have larger diameters than standard screws. They are built to meet the fastening demands of important structural elements.

What Are Hex Cap Screws Made From?

Different grades of metal are used to make different kinds of hex cap screws. These fasteners are commonly manufactured from low-carbon steel, medium-carbon steel, alloy steel, and other steel alloys. Coatings, like steel plating, zinc coating, and hot-dipped galvanizing, produce different finishes for hex cap screws that provide corrosion resistance.

What Are Applications Of Hex Cap Screws?

Hex cap screws are sought out for their ability to perform dependably with precise tolerances and extended bearing. They are used on repair projects as well as new construction, structural framing, and woodworking. They come in many sizes and various materials that determine their light-duty or heavy-duty capabilities.

How Are Hex Cap Screws Tightened?

Hex cap screws need to be tightened or loosened by turning their heads with a wrench, ratchet, or power drill. The direction of a screw's threads indicates the correct way to turn it for tightening or loosening. A left-handed hex cap screw, for example, must be tightened with counterclockwise rotations.

Do Hex Cap Screws Need A Washer?

Hex cap screws featuring a washer face eliminate the need for a separate washer. The washer face extends from the screw head and distributes the force when the screw is tightened. Some specific applications, however, might still warrant the placement of a washer on the nut end.

Are Socket Head Cap Screws The Same As Hex Cap Screws?

Socket head cap screws are installed with the use of a hexagonal tool, such as an Allen key. The tool fits into the recessed area of a grooved, cylindrical head. A hex cap screw is a different type of fastener. It has a six-sided head that is turned by a wrench or ratchet.

Are Hex Caps Fully Threaded?

Fully threaded shafts can be expected on hex cap screws measuring up to 1-1/4 inch in length. Longer hex cap screws will generally be made with only partial shaft threading. Their shafts will have smooth metal between the head and the point where the screw threading begins on the shaft.

Are Cap Screws The Same As Hex Bolts?

Hex bolts and cap screws are installed in different manners. A hex bolt is tightened with a nut while a hex cap screw is tightened by its head. Cap screws look a little different from hex bolts although both have hexagonal characteristics. Cap screws will have a chamfered or beveled end, and they usually have washer faces.