Specification table for internal hex socket bolts and internal hex socket bolt specifications

Internal hex socket bolts are common fasteners, but understanding and selecting specifications is very important. Below, we will introduce the specifications of internal hexagonal bolts and the table of internal hex socket bolts specifications.

Internal hex socket bolts specifications

The determination of specifications for hex socket bolts involves the following aspects:

1. The inner hexagonal mouth allows for the placement of pins, which can be chamfered or countersunk.

2. The end chamfer d<=M4 is the rolled end.

3. The length of incomplete threads U<=2P.

4. The top edge of the head can be round or chamfered, at the discretion of the manufacturer.

5. The bottom edge can be round or chamfered to Dw, but there must be no burrs.

6. The standards for internal hex socket bolts include GB/T2672, GB/T2673, GB/T2674, GB/T6190, and GB/T6191.

Specification of hexagon socket bolts in English system

The specifications of hex socket bolts can be sorted according to the imperial system, which is based on inches and divided into 8 equal parts by 1 inch, known as 1 minute. For example, 1/8, 1/4, 1/2, etc. are called 1/2, 2/4 screws. In addition to using 1/8 inch as the base, screws with 1/16 inch as the base can also be purchased in the spot market, for example, 3/16 is called a split screw.

The sorting of imperial screws is done in ascending order, while both metric and imperial screws are measured by screw diameter, but imperial screws have a higher tooth pitch. The tooth pitch of a screw is calculated based on the total number of teeth per inch of length. The larger the screw diameter, the less tooth pitch. In addition, the tooth pitch of British screws is subdivided into two types: coarse teeth and young teeth.

Both imperial and metric screws are expressed in terms of screw diameter and length, while 1 inch is approximately equal to 25.2 millimeters. Because the base numbers of English and metric screws are different, they can be expressed in writing, but cannot be interchanged in practical applications.

In summary, understanding the specifications of hex socket bolts and the table of hex socket bolts specifications is very helpful for us to understand and choose hex socket bolts. Only by mastering the specifications and classifications can we better select and use hex socket bolts to achieve better results.