Check the listing for details. Trailer Latch Truss Barrel Nut Dome Head 8 PCS 5/16″-18 Full Pass Thru. Condition: New. Listed at 15.93 USD. (8) - Torx Dome Head Barrel Nuts Large .... NEW Barrel nut 5/16" - 18 x .625"L (coarse thread) Zinc plated steel T45 torx bit or 5/16" hex bit required to tighten Head diameter 1" (1.000") Barrel length from inside of flange 5/8" (.625") long Barrel diameter .430" Bolt does pass thruUsed with 5/16" carriage bolts for mounting hasp, door handles and other items on inside of trailer Nuts designed to work with Cam lock , bar lock door, Swing hinge handle that are placed on van, cargo,utility, toy hauler, motorcycle trailers. Check out our other trailer hardware handles listed on Ebay Shipping: This item ships standard ground service, expedited offered. We do combine shipping on multiple products ordered if available (not all products can be shipped together). You will be contacted if there is any delay in processing your order. Shipping cutoff at 12 pm CT . Business hours M-Th 8 am - 3:30 pm CT, excluding holidays.