Keystone Electrical Supply Company, Inc. has served the electrical needs of Western PA since 1948. We are a Veteran owned small business and our professional staff can service your requirements in a timely manner. Centrally located in Butler, PA with over 35,000 Sq. Ft. of warehouse, we have a vast inventory of products for the Industrial, Commercial, and Residential markets. There is a good chance we have in stock those brands that you use. Our own fleet of delivery vehicles will insure you get material when needed. Please view our “line card” for those manufacturers that you use most often and call (or e-mail) us for a competitive quotation. Let us serve you-we want to earn your business!