Allen bolt also known as socket head cap screw is one of the most common type of bolt in industries or most specifically the most common machinery bolt. Allen bolt is manufactured partially threaded according to DIN912 standard but due to the market demand also fully threaded Allen bolts are used. socket head cap screws are manufactured in different grades of carbon steel and stainless steel. carbon steel grade of 8.8 with tensile strength of about 800 N/mm2 and also 12.9 with tensile strength of 1180 N/mm2 are the most common and used grades of Allen bolts. most cap head screws are produced with COARSE threads and are attached using standard hex nuts of DIN934 same as hex bolts.
Allen bolt 5.6
8.8 Allen Bolt
Stainless steel Allen Bolt
Partially threded Allen boltAllen bolts have similar mechanical properties as hex bolts in terms of application and strength however they are manufactured following the DIN912 standard that determines the head and cap size of Allen bolts based on the bolt diameter. in general, the real advantage of Allen bolts over hex bolts is the easier way of fastening and opening them since the driver head is place properly within the hole of Allen bolts as opposed to the hex bolts that the driver is bound to slip from the edge of the bolt. both types of industrial bolts hex and Allen bolts are fastened along with standard DIN934 hex bolts following the grade of bolt.
