An assortment of grade 5 hex cap screw variants from The Hillman Group. Hex cap screws can be used when looking for outdoor applications or simply a stronger bolt. Variants included in this assortment feature a fine 7/16"-20 thread size and range from 3/4" to 4" in length. Full assortments of #1691 contain eight (8) refills comprised of Hillman item numbers #1692 - #1699.