A shoulder bolt (also called a stripper bolt), has a shank with a larger diameter immediately below the head that “steps down” to a smaller diameter for the threaded length, usually by a factor of one diameter. Shoulder bolts are installed with Allen hex keys.

The change in diameter provides the shoulder, which can be firmly tightened against the part to that which it is screwed. This allows a shoulder screw to be fastened to one part without clamping the other part, allowing it axial clearance.

The shank provides a smooth bearing surface for a pin joint connection between the parts. Sometimes a shoulder bolt is even used as a spacer. Primarily available in alloy steel, some sizes are available in stainless. Metric sizes can be quoted upon request.

Talk to Hardware Everywhere’s knowledgeable customer service team for help choosing the fasteners that match your application. Call us at 1-800-432-8979 or contact us online.