An assortment of class 10.9 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 coarse M22-2.50 thread size and range from 100mm to 150mm in length. Full assortments of #34857 contain six (6) refills comprised of Hillman item numbers #34858 - #34863.