This Hex Bolt Master assortment kit includes hex bolts, hex nuts, flat washers, lock washers & nylon insert lock nuts. All are type 316 stainless steel. Diameters included are 1/4-20, 5/16-18 & 3/8-16 (all are coarse threads). Hex bolt lengths range from 1/2" to 2" long. A total of 470 top grade T316 stainless fasteners all neatly stored in a durable (14"x9"x2") double pro-latched storage box. Every fastener type is individually bagged inside the box to ensure nothing moves out of place during shipment. This kit can not be matched! Breakdown of what is included: Part DescriptionSizeQuantity T316 Stainless Hex Head Bolt1/4-20 x 1/2 10pcs T316 Stainless Hex Head Bolt1/4-20 x 3/4 10pcs T316 Stainless Hex Head Bolt1/4-20 x 1 10pcs T316 Stainless Hex Head Bolt1/4-20 x 1-1/2 10pcs T316 Stainless Hex Head Bolt5/16-18 x 3/4 10pcs T316 Stainless Hex Head Bolt5/16-18 x 1 10pcs T316 Stainless Hex Head Bolt5/16-18 x 1-1/2 10pcs T316 Stainless Hex Head Bolt5/16-18 x 25pcs T316 Stainless Hex Head Bolt3/8-16 x 3/410pcs T316 Stainless Hex Head Bolt3/8-16 x 1 10pcs T316 Stainless Hex Head Bolt3/8-16 x 1-1/2 10pcs T316 Stainless Hex Head Bolt 3/8-16 x 2 5pcs T316 Stainless Hex Nuts1/4-20 30pcs T316 Stainless Hex Nuts5/16-18 30pcs T316 Stainless Hex Nuts3/8-16 30pcs T316 Flat Washers1/4" 40pcs T316 Flat Washers5/16" 40pcs T316 Flat Washers3/8"40pcs T316 Lock Washers1/4" 30pcs T316 Lock Washers5/16" 30pcs T316 Lock Washers3/8" 30pcs T316 Stainless Lock Nuts1/4-20 20pcs T316 Stainless Lock Nuts5/16-18 20pcs T316 Stainless Lock Nuts3/8-16 20pcs