The bolt can be specified by

Explanation:

Fasteners:

• Fasteners that fall into the category utilize the wedging action of screw thread for clamping pressures.
• To achieve maximum strength, a threaded fastener should screw into its mating part a distance equal to 1.5 times (minimum) the diameter of the thread.

Machine bolts:

• Machine bolts are manufactured with square and hexagonal heads.
• They are used where a close tolerance assembly is not required.
• The bolt can be specified by the type of thread.
• Available in diameter 6 mm to 75 mm and in length 12 mm to 300 mm.
• Tightening the nut on the machine bolt produces clamping action.

Designation:

• Metric thread bolts and screws are identified by a letter M for the thread profile form.
• The letter M is followed by the value of nominal diameter expressed in millimeters and nominal length separated by the sign “x”. (Example: M 8 x 35)