Fastening Hardware

What is Stick Slip?

Stick-slip is the condition where the screw, instead of rotating uniformly as torquing continues, begins to show a stop-start pattern. When this happens, the torsioning effect on the screw is being absorbed as excess friction between the threads or the underside of the head and the mating parts of the collar, instead of contributing to the stress in the joint of the elements.

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Socket Head Cap Screws

Our collars and couplings, whether its aluminum, alloy steel stainless steel, zinc plated steel or plastic, require either alloy steel or stainless steel screws. Some may also require Nypatch in order to prevent an loosen of the screw.

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Socket Set Screws

Our socket set screws are available in either alloy steel or 18-8 stainless steel and in metric or inch measurements.

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Tool size for Fastening Hardware

Our socket head cap screw and set screw comes in both metric and inches. See which size hex wrench would fit the corresponding screw.

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Metal Torque Chart

Our inch forged socket cap screw and metric forged socket cap screw require different torque when tightening. Torque is also dependent of the material used whether its alloy steel or stainless steel.

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Plastic Torque Chart

Unlike the rest of our standard shaft collars and couplings that have a single torque rating per screw size, plastic shaft collars are extremely dependent on collar size to determine acceptable torque limits. Due to the elastic nature of plastics, it is recommended that screw torque be applied in a slow and steady manner as to not induce extra shock into the plastic resulting in premature collar failure.

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