Introducing the Nylon lock nut assortment Kit by POWERTEC. This premium assortment of nylon insert hex lock nuts were carefully put together for everyday use at home, or in the workshop. Made of high grade 18-8 stainless steel, these anti-slip threaded inserts feature tight gripping Nylon - offering a reliable, durable and heavy-duty option for joining materials together, and many of your hardware or installation needs. This assortment of nylon lock nuts Comes packaged in a convenient and accessible clear-plastic carrying case. The sorting case features 7 compartments for proper item placement and organized workflow. Lock nut sizes and quantities for 1-set: M3 (55), M4 (35), M5 (30), M6 (25), M8 (15), M10 (10), M12 (5).