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M27 Hex Bolts Gal
Hex Head Bolts
A Hex Head Bolt is acylindrical fastener with an integral head on one end and an external screw thread on the other end designed to be inserted through holes in assembled parts and to mate with an internally threaded block, called a nut, which is turned to tighten or loosen the bolt. Tensioning the fastener by turning the nut differentiates a bolt from a screw, which is tightened by turning its head.
Bolts are generally manufactured from metals, but bolts made of other materials, such as nylon, are commercially available. The properties of some bolting metals are modified by heat treatment and other means to increase yield strength. Bolt heads have various shapes to suit different applications. Hexagon-headed bolts (hex bolts) are available in two head widths for the same body diameter -- regular hex bolts and heavy hex bolts, which have wider heads. The heavy-series bolts are normally supplied with heavy nuts that are wider and thicker than regular nuts.
