KL Jack & Co. - Industrial Fasteners & Supplies - 1-866-471-3626 - Stocks over 22 Million pieces of fastener inventory contributing our 97% Fill Rate! Wide selection of Grade 5, Grade 8, Stainless Steel, Brass, Socket, Metric Fasteners. Shop KL Jack for MRO and Industrial Supplies along with Safety Equipment. The Northeast's Best Industrial Supply Source - Maine, Massachusetts, New Hampshire, Vermont and USA