Imperial bolts are bolts with thread dimensions marked in imperial units, also known as inch bolts or imperial screws. It is usually measured in inches and has two types of shapes: cylindrical and conical, with tooth angles of 55 ° and 60 °. The thread size marking of imperial bolts usually refers to the thread diameter, measured in inches. For example, markings such as 1/4, 1/2, 1/8, etc. refer to the diameter of the thread size.
In contrast, metric bolts use millimeters as the unit, also known as metric bolts. The conversion between imperial threads and metric threads can be done using conversion tools. For example, the thread specification of imperial 6 # -32 is equivalent to the metric M specification, which can be converted using the corresponding conversion tool.
In addition, the marking of pipe threads usually includes NPT, PT, G, etc. Among them, NPT is the abbreviation of National (American) Pipe Thread, which belongs to the 60 degree cone pipe thread of the American standard; PT stands for Pipe Thread, which is a 55 degree sealed conical pipe thread; G is a 55 degree non threaded sealed pipe thread, belonging to the Wyeth thread family. The markings on these pipe threads represent different standards and types.
In summary, English bolts are a type of bolt with thread dimensions marked in English, typically measured in inches. Understanding different types and standards of threads can help users choose and use them more clearly and accurately.
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Post time: Aug-06-2024