Carriage Bolts, Washers & Nuts For Bunk Boards

Carriage Bolts, Washers & Nuts 3/8" Diameter X 3" Long for Securing Bunk Boards to Trailers Available in Zinc Galvanized or Stainless Steel Finish Use Carriage Bolts for securing new boat trailer bunk boards to your trailer that are countersunk from above and secured tightly with a washer/nut underneath.  All Carriage Bolts include INCLUDE a 3/8" flat washer that is 1.00" in diameter and a 3/8"-16 thread nut.  Shipping Cost is $8.99 if Hardware is purchased separately.  Ships for FREE when you purchase over $39.99 using Promo Code: "BunkHardware" Category Carriage bolts & Plow bolts Bolts with no drive and machine threads for use with a nut. Head style Carriage Carriage heads are large smooth and domed with no drive. Neck style Square Material Steel Plating Zinc or Stainless Steel Thread density Coarse Diameter 3/8" Thread count 16 Length 3" Dimensional standard ASME B18.5 Length tolerance +0.04" / -0.06" Thread direction Right hand Head diameter 0.