COVID-19 Update: The safety and health of our employees is treated with the utmost importance. With approximately 45,000 employees across the globe, we are closely monitoring the Coronavirus (COVID-19) outbreak and are taking steps to protect and support our colleagues.

At this time, we do not anticipate any delays in service. Although it is too soon to tell the full impact this health situation will have on our businesses and supply chain, we will closely monitor the situation and provide updates here as they are available.

Better Fasteners for Better Products

From the weekend warrior to the professional, ITW Shakeproof Group products are found in a variety of consumer applications.

Fastener Solutions for Unique and Common Challenges

“The startling fact is that experts project upwards of 95% of fastener failures are the result of poor selection or improper installation.”

-NNI Training and Consulting, Inc.

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Welcome to Shakeproof

ITW Shakeproof Group is a leading designer and manufacturer of value added, high quality engineered hardware solutions.
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Contact Information

2550 S 27th Avenue
Broadview, IL 60155 

W6331 Bee Rd 
Watertown, WI 53098 

Lock Washers
3704 N Palmer Rd 
Milwaukee, WI 53212 

W6331 Bee Rd 
Watertown, WI 53098 

Don't Forget To Meet Our Team.

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John Allitto
John Allitto
Dona Fienberg
Dona Fienberg
Co-Founder & CEO
John Spiliotis
John Spiliotis
Hr Menager

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Track Washers
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Track Washers have been standardized for the rail industry since 1887.

While that standard predates ITW Shakeproof, our track washers were designed to exceed the ultimate test of any rail- joint spring washer—maintaining proper bolt tension under extreme shock, vibration, pressure, and environmental conditions. Today our Track Washers are certified to the American Railroad Engineering Association (AREA) standards.

Quality is the key. In raw materials, high –grade alloy steel is essential. In production, each stage of the manufacturing process is carefully monitored, controlled, and measured. Final test and inspection are conducted prior to packing. The result is economical spring washers that will prolong life of the rail and joint assemblies while reducing maintenance costs.

Track Washer Styles:

  • Improved High Power Spring Washers
  • Pennsylvania Railroad Specifications MW-6 Spring Washers
  • Plain Pattern Square Section Washers
  • Double Coil Improved High Power Spring Washers


  • Nominal bolt diameters: 15.875 mm (0.625”) thru 76.200 mm (3.0”)
  • Most special dimension washers can be produced to meet customer specifications and tolerances.


  • High quality, high carbon, boron additive steel

Standards and Specifications

  • AREA 1967, AREA 1933, Pennsylvania Railroad Specification MW-6


  • Certificate of conformance
  • Chemical and physical certification with complete traceability to melt process
  • Test Certification to specific customer requirements

Quality Control

  • In-Process Controls are employed in all areas of production
  • Other Quality Control Procedures
    • Ductility Test - 90° twist
    • Reactive Pressure Performance Test
    • Permanent Set Test


  • All washers packed in 2.5 plastic pails
  • Canisters are palletized and plastic wrapped

Regular SeriesThe tension generated by the deflection of the Regular helical spring lock washer meets the needs of most commercial applications. It is, therefore, the most popular type of helical spring lock washer in terms of usage and production.

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