An assortment of class 8.8 metric hex cap screws from The Hillman Group. Hex cap screws, or hex bolts, are perfect for most applications in which a stronger, sturdier bolt is desired. A common feature on hex cap screws is a washer surface directly under the head which creates a better seal. Included variants feature a fine M18-1.50 thread size and range from 30mm to 100mm in length. Full assortments of #34428 contain eight (8) refills comprised of Hillman item numbers #34429 - #34436.