A Hillman assortment of class 8.8 metric hex cap screws with thread size M6-1.00. 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. The assortment features hex cap screws in variants featuring M6-1.00 coarse screw thread in lengths ranging 10mm thru 45mm. Full assortments of #1451 contain seven (7) refills comprised of Hillman item numbers #1452 - #1458.