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Industry Industrial supply
Founded 1901
Headquarters Elmhurst, Illinois

McMaster-Carr Supply Company is a private, family-owned supplier of Maintenance, Repair and Operations (MRO) materials and supplies. McMaster maintains over 555,000 products in a catalog offering a variety of mechanical, electrical, plumbing, and utility hardware not usually located from a single source.

The company is based in Elmhurst, Illinois and has distribution branches in Robbinsville, New Jersey; Santa Fe Springs, California; Atlanta, Georgia and Aurora, Ohio.[1][2]


McMaster-Carr annually releases a large catalog containing the bulk of its product selection.[3] The print edition of the catalog is noted for its limited distribution, sent only to established customers.[4]



McMaster-Carr's website has been used as a positive example of link-rich design and good user interface.[5] The website also includes useful design tips and explanations of material properties as well as a categorical parametric search engine. McMaster Carr withholds manufacturer identification and brand names of most of the products they sell. The site ranked third in a 2002 study performed at Stanford University about trust and credibility, just behind Amazon and Barnes & Noble.[6]

Mobile phone app[edit]

The McMaster app was released in May 2013 for the iPad[7] and March 2014 for Android tablets.


In 2015 McMaster-Carr was recognized by customers, in a survey by B2B business reviewer VendOp, as one of the top B2B vendors in the United States in multiple categories.[8]

See also[edit]


  1. ^ "Company Overview of McMaster-Carr Supply Company". Bloomberg Business. Retrieved March 28, 2015. 
  2. ^ "McMaster-Carr - Contact Us". Retrieved March 28, 2015. 
  3. ^ LaPlace, Jules (August 28, 2013). "McMaster-Carr Catalog". AIGA. Retrieved March 28, 2015. 
  4. ^ Sung, John (March 18, 2015). "Techronomicon: The McMaster-Carr Catalog". Highway1. Archived from the original on April 2, 2015. Retrieved March 28, 2015. 
  5. ^ Spool, Jared M. (June 15, 2006). "Lifestyles of the Link-Rich Home Pages". User Interface Engineering. Retrieved March 28, 2015. 
  6. ^ Fogg, B. J.; Soohoo, Cathy; Danielson, David; Marable, Leslie; Stanford, Julianne; Tauber, Ellen R. (November 11, 2002). "How Do People Evaluate a Web Site's Credibility?" (PDF). Archived from the original (PDF) on June 13, 2010. 
  7. ^ Edman, Lenore (June 18, 2013). "McMaster-Carr iPad App". Retrieved March 28, 2015. 
  8. ^ VendOp Best B2B Vendors 2015

External links[edit]