ITW Shakeproof industrial


ITW Shakeproof Industrial has developed multiple innovative screw designs — such products as GripTide™, BosScrew®, and the Plastite™, that have gone on to become industry standards.

Our new WERCS Technology is again, revolutionizing the industry, in the design and manufacturing of threaded solutions. The WERCS Technology allows our engineers to develop superior thread geometries to tackle your most demanding applications. The industry’s most innovative platform of threaded products—the BosScrew, the Shakeproof Thread, and the Shakeproof Thread, are ready to conquer your most difficult design challenges.

Licensed Manufacturer of:

  • Taptite
  • Plastite
  • Torx
  • Torx Plus
  • Quadrex
  • ACR II
  • PSD
  • MAThread


Threaded Fasteners

Removable. replaceable mechanical fasteners generally rely on mating threads to produce a secure assembly. The tightness or integrity of a threaded assembly is primarily dependent on two factors:

Friction is generated at the contact areas of mating threads, the undersurface of the screw head in contact with a work surface. and, if a nut is involved in the assembly, the upper surface of the nut that is in contact with the bottom work surface. Lock washers and bearing washers can enhance surface friction.

When torque is applied, screw threads have a tendency to advance even after the screw head bottoms against the work surface. Screws or bolts are, in effect, stretched. A steel bolt or screw will elongate approximately .002″ per inch of effective length when stressed at 60,000 PSI.

Components beneath the screw head and between the screw and any nut that may be involved, are compressed. Materials have an innate tendency to return to their original form. Like a stretched spring, the extended screw wants to contract. The compressed components want to expand. These conflicting forces generate the tension that keeps assemblies tight. This tension can be enhanced and sustained through the addition of washers – lock washers, conical washers, spring washers and combinations of these – which can be preassembled to screws in the form of Sems.

Initially, the amount of friction and tension generated in an assembly is largely determined by the amount of twisting force. or torque, that can be applied to the threaded fastener without stripping out the mating threads. This is, in part. determined by how the mating threads are formed and the nature and thickness of the material in which they are formed. The threaded fasteners in this catalog are presented accordingly.

Our mission at Shakeproof is to provide the highest quality, most cost-effective fasteners and components in conformance with all customer, industry and government requirements and to provide these products on a reliable and timely basis. We will conduct every aspect of our business in an ethical manner that will sustain the trust so essential to successful customer/supplier relations.

At every organizational level, the men and women of ITW Shakeproof are committed to total quality excellence in the design, manufacture and supply of the company’s fasteners and components. Inherent in this commitment is a dedication to continuous improvement in every aspect of Shakeproof’s products and operations. At ITW, our goal is to create value and improve the operating effeciencies of every one of our customers.