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Shoulder Screws Information
Shoulder screws are a type of machine screw with integral threads that are only present on half or less of the screw shank. A shoulder screw has a partially smooth shaft that will allow the bolted material some rotation and movement around the screw axis, while the threaded end will typically have a nut to maintain the screw's position. These screws must be used with predrilled holes, and are common in machinery with vibration and heat variations. These are also called stripper bolts.
Shoulder Screw Operation
Like other screws, shoulder screws are meant to hold objects together and in position. However, they do not have a tapered shank, so they do not self-thread into soft materials. They are used in instances where pre-tapped holes require alignment with some tolerance. This allows the workpieces either a joint, pivot, or sliding motion. These screws are available in metric and imperial units.
Shoulder screws have three sections: head, shoulder, and thread. The head is the largest diameter section of the shoulder screw, which prevents the screw from being inserted further than its length, and provides a bearing surface, as well as a drive mechanism (slotted, hex, etc.) so the screw can have torque applied for its installation. The shoulder is the smooth, middle section of the screw which contains the lateral movement of the workpieces. The threaded section has helixed grooves that have a major diameter slightly smaller than the shoulder diameter. This section is for insertion into a mating thread, be it a nut or tapped hole.
Shoulder Bolt Dimensions
| Shoulder Diameter (A) |
Thread (C) |
Thread Length (D) |
Head Diameter (E) |
Head Height (F) |
Allen Wrench Size |
|---|---|---|---|---|---|
| Shoulder Bolt 1/8 | 4-40 | 3/32 | 1/4 | 1/8 | 5/64 |
| Shoulder Bolt 3/16 | 8-32 | 3/16 | 5/16 | 5/32 | 3/32 |
| Shoulder Bolt 1/4 | 10-24 | 3/8 | 3/8 | 3/16 | 1/8 |
| Shoulder Bolt 5/16 | 1/4-20 | 7/16 | 7/16 | 7/32 | 5/32 |
| Shoulder Bolt 3/8 | 5/16-18 | 1/2 | 9/16 | 1/4 | 3/16 |
| Shoulder Bolt 1/2 | 3/8-16 | 5/8 | 3/4 | 5/16 | 1/4 |
| Shoulder Bolt 5/8 | 1/2-13 | 3/4 | 7/8 | 3/8 | 5/16 |
| Shoulder Bolt 3/4 | 5/8-11 | 7/8 | 1 | 1/2 | 3/8 |
| Shoulder Bolt 1 | 3/4-10 | 1 | 1-5/16 | 5/8 | 1/2 |
| Shoulder Bolt 1-1/4 | 7/8-9 | 1-1/8 | 1-3/4 | 3/4 | 5/8 |
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Types of Bolts | ||||
Shoulder Bolts Application Industries
Sunflex Metal Industries are engaged in manufacturing of robust quality of Shoulder Bolts. These Shoulder Bolts are widely used in the following industries:
Mining Industries Transport Industries- Rail and Road Construction Industries / Building Systems Manufacturing Industries Agriculture Industries Energy Industries Water Industries Automotive Industries Ship Building Industries Nuclear Power Plant Paper & Pulp Industries Sugar Industries Engineering Cement Industries Petro-Chemical Industries Food Industries Oil & Gas Industries Chemical & Pharmaceutical Industries
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