An assortment of class 10.9 metric flange bolts & nuts from The Hillman Group. Flange Bolts are one-piece hex washer-head bolts with a flat bearing surface. The flange eliminates the need for an additional flat washer. Flange lock nuts are one-piece, all-metal prevailing torque hex nuts. They can be screwed onto the end of a flange bolt to create a secure, closed fastener. Variants included in this assortment feature a fine M12-1.50 screw thread and run 25mm thru 60mm in length. Full assortments of #34817 contain seven (7) refills comprised of Hillman item numbers #34818 - #34824.