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 coarse M6-1.00 screw thread and run 12mm thru 40mm in length. Full assortments of #43326 contain eight (8) refills comprised of Hillman item numbers #43327 - #43334.