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 fine M16-1.50 thread size and range from 110mm to 160mm in length. Full assortments of #34365 contain six (6) refills comprised of Hillman item numbers #34366 - #34371.