18-8 Stainless Steel Hex Tap Bolt Kit - 199pcs - Assorted stainless steel Hex Tap Bolts in inch sizes 1/4"-20 through 3/8"-16 in a durable heavy plastic box. Lengths up to 2". This fastener kit includes matching stainless steel hex nuts, flat washers and lock washers for the hex bolts. All fasteners in this kit are 18-8 stainless steel. See table below for more specifications.