If you use these much, mscdirect.com is strong competition for mcmaster-carr, because they often have better prices and their shipping is very fast--although th

If you use these much, mscdirect.com is strong competition for mcmaster-carr, because they often have better prices and their shipping is very fast--although the site can only be used in internet explorer at times. These are all US-centric, because there are great sites in Europe that operate in the same space and will also be competition for Amazon.