This is a usability benchmark of the homepage and category navigation of 100 top e-commerce sites. You’re currently navigating by page type (Intermediary Category Page). You can also navigate by case studies.
On this page there's 6 highlights (pro only) outlining what Grainger are doing right and wrong. The screenshot was taken March 14, 2016 and depicts Grainger's Top-Level Navigation and Intermediary Category Page.
In total, 5 of Grainger's pages have been benchmarked across 79 usability guidelines from the Homepage & Category research study. See full Grainger case study.