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An important point about the dimension of the hole to be drilled is it must of the same diameter as the diameter of the bolt or slightly larger than that. Bolt Materials
In metric system, the strength of the bolt is determined using its class number, which is also printed on the head of the bolt. Higher the class number, greater is the strength of the bolt. If the number is followed by another number (for example, 10.9), then the second number represents the yield strength of the bolt, which determines the stress it can handle before it cannot return to its original shape without damage. Before looking at the Bolt Size Chart, let us first try to understand different proportions and dimensions associated with a bolt. The following image shows a typical hex bolt with all the important dimensions marked on it. Another important specification associated with bolts is its grade (imperial) or class (metric), which determines the tensile strength of the bolt. The tensile strength of a bolt is the maximum stress / stretch it can handle before it breaks. EasyMech SS Hex Nut are internally threaded and have a hex drive for nearly all general applications. It is most commonly used nut for wide range applications. Hex Nuts are used in any application with a mating male threaded machine bolt or screw. Can be used with any fastener with a machine screw thread. Hex Nuts are used with compatible sized bolts and washers. The material used in the manufacturing of the bolts will determine its strength, applications, corrosion resistance etc. There are several materials of Bolts and some of the popular ones are:Thread Pitch is an important dimension associated with a Bolt. In imperial system, the thread pitch of the bolt is determined by the number of threads in one inch. In metric system, the distance between two adjacent threads in millimeters is considered as the Thread Pitch. Brass / Bronze: These types of bolts have a natural resistance to corrosion as they are alloys of copper. They are generally expensive than other bolt materials and as a result they are often used in arts and decorative pieces. Consider a Class 10.9 Bolt. Here, this bolt has a tensile strength of 1,000MPa (145,000PSi) and a yield strength of 900MPa (130,000PSi).
IMPORTANT NOTE: People often confuse between the size of the bolt and the size of the bolt head. When we say ‘size of the bolt’, it usually means the diameter of the bolt’s shank. The size of the bolt head is used to determine the size of the wrench to tighten or loosen the bolt. Grade or Class Stainless Steel: One of the toughest bolt materials with very good corrosion resistance. As a result, stainless steel bolts are often used in industries, automobiles, ships (and other marine equipment) and outdoor objects in general. They are slightly expensive than the Zinc plated counterparts.If two parts must be joined together, then the first step is to drill a hole in the objects. The hole can be tapped or normal. If the hole is a tapped hole, then the bolt can be simply threaded into the hole (provided the pitch of the hole and the bolt is the same) without the need for a nut to secure the bolt. If it is a normal hole, then you have to use a washer and nut to properly secure the bolt. As Bolts and Nuts are one of the commonly used fasteners, there are different types of bolts for different types of applications. Some of the more common and popular types of bolts are: The head of the bolt is usually hexagonal shape (sometimes square or circular) and is used to tighten or loosen the bolt. The size of the head is dependent on the shank’s nominal diameter. The Bolt Body consists of the main shank with full or partial threads. Bolt Body can have important dimensions. They are:
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