SHOULDER BOLT

A shoulder bolt is a mechanical fastener that screws into one part and delivers a freely spinning pin joint linking to another part. A shoulder screw, also called a shoulder bolt, has a shank with a larger diameter closely below the head that “steps down” to a smaller diameter for the threaded length. Much like other fasteners shoulder bolts are meant to grip objects together and in a specific position. However, these screws are intended for use in parts that necessitate a mounting pin, joint, shaft, dowel, pivot, or sliding motion. The shoulders give the screws their flexibility by acting as shafts or rods for rotating items such as comportments and bushings, axles for rolling parts, guides for sliding elements, and hinge points or mounting pins. Shoulder screws are frequently used in punch-and-die apparatuses or plastic-injection mold sets.

Shoulder bolts comprise three main sections: head, shoulder, and thread. The head has the largest diameter, the shoulder is described by its diameter and length, and the thread has a major diameter slightly smaller than the shoulder diameter. Shoulder bolts or stripper bolts are machine screws with an essential shoulder between the head and thread. Although they are not voluntarily available in local hardware stores, shoulder screws are used widely in industries from aerospace to consumer products because of their flexibility and unique qualities when installed. Pulleys, gears, and sprockets can rotate at reasonable speeds on shoulders. Shoulder-mounted springs can preload components traveling axially along the length of the shoulder.

ASME, BS, ISO, DIN, SAE and all international standards