The ShakeProof lock washer from Illinois Tool Works Inc. - small accessory, big impact on bolt security
23.06.2026 - 03:22:26 | ad-hoc-news.de
Reviewed: ad hoc news Accessory & Components desk. Edited and checked on 2026-06-23, 03:21. Details in the imprint.
ShakeProof lock washer from Illinois Tool Works Inc. bites into metal with tiny teeth that you can feel catch as you tighten a bolt, turning a forgettable washer into a quiet safety layer for vibrating machinery.
Why this washer matters
At first glance the ShakeProof lock washer looks like any other thin ring of steel, but its serrated profile is engineered to dig into both the bolt head and the joint surface under load.
That simple mechanical grip helps keep tension in bolted joints exposed to vibration, temperature swings, and heavy cycling, where plain washers often allow the assembly to slowly loosen.
Background on Illinois Tool Works shares
Bolt-fastening components like the ShakeProof line are just one of many small parts feeding into the diversified earnings power behind Illinois Tool Works shares.
The design in daily use
When a maintenance technician slides a ShakeProof washer under a bolt head and starts tightening, the first turn feels smooth, then a faint rasp appears as the teeth start to bite.
That tactile feedback is intentional, signaling that the washer is actively resisting future movement, which can be decisive on pump housings, conveyor guards, or rail brackets that cannot be checked every day.
Small part, broad portfolio
Illinois Tool Works chief executive E. Scott Santi likes to highlight the group’s focus on highly engineered consumables that solve very specific problems, and ShakeProof washers are a textbook example of that philosophy in metal.
They sit alongside other fastening products in sectors from automotive and construction to general industrial, where unplanned downtime from a loose joint can cost far more than a whole box of washers.
Strengths and trade-offs
The main strength of the ShakeProof concept is robustness: once installed correctly on a clean surface, the serrations create a mechanical lock that does not rely on adhesives or complex torque procedures.
However, those same teeth can mark softer surfaces and are less suitable where cosmetic finish matters, so engineers often pair them with harder contact faces or choose alternative lock mechanisms for visible assemblies.
Where you will encounter it
In North America the washers are typically sold through industrial distributors and fastener specialists, ending up in OEM production lines but also in the drawers of plant maintenance workshops.
In Europe and other regions they tend to appear as specified components in machine builders’ parts lists, rather than as consumer-visible items, even though the part itself is tiny and inexpensive.
Context and share reference
Illinois Tool Works builds much of its earnings on exactly this type of quiet, recurring-component business, spread across hundreds of product families and customers worldwide. Illinois Tool Works shares (ISIN US4523081093) are listed on the NYSE in US dollars.
Key facts on this ITW washer
- Product: ShakeProof lock washer
- Manufacturer: Illinois Tool Works Inc.
- Category: Accessory / fastening component
- Launch: Longstanding product line, continuously updated
- RRP / Price: Typically sold in bulk packs via distributors, pricing by quantity
- Availability: Industrial distribution channels in North America and international markets
- Target group: OEM engineers, maintenance teams, industrial equipment builders
- Highlight / USP: Serrated profile that mechanically resists loosening under vibration
This article was AI-assisted and editorially reviewed. Product information without guarantee; prices and availability may change at short notice. No investment advice, no buy or sell recommendation. Stock-market transactions involve risks up to total loss.
