3/8-16 x 2-1/2" Carriage Bolts Kits, Grade A2-70, 304 Stainless Steel Carriage Screws with Hex Nuts and Washers, Round Head Square Neck, Coarse Thread

3/8-16 x 2-1/2" Carriage Bolts Kits, Grade A2-70, 304 Stainless Steel Carriage Screws with Hex Nuts and Washers, Round Head Square Neck, Coarse Thread

Package Contents: 8 Sets, each set includes 1pcs x 3/8-16 x 2.5 in carriage bolt, 1 pcs hex nut fits 3/8-16 carriage bolt and 1 pcs 3/8" inside diameter flat washer Screw Length: 2-1/2 inch or 63mm (measured from under the round head, including the square neck height) Diameter of the screw head: 20-21.5mm; Height of the screw head: 4.8-5.3mm; Height of the square neck: 4.8-5.7mm; Design feature: Big round domed head designed to eliminate the need for a washer; Square neck underneath the head helps self locking; Their strong holding power ensures the stability and reliability of your contructions; Use wrench or plier tools to turn the square neck to install them Material: 304 Stainless steel 18/8 which provides good strength and perfect corrosion resistance in bad environments like high temperature, cold weather and high humidity areas without the need for time consuming and costly maintenance Carriage bolts are desgined with a big smooth round domed head and a square neck underneath the head. The big head helps eliminate the need for a washer and the square neck is self locking to eliminate spinning and the need for a driving tool. Carriage bolts are commonly used to fasten a wooden part to either wood or metal frame. The 304 stainless steel provide perfect strength and good corrosion resistance in bad environments like high temperature, cold weather and high humidity areas without the need for time consuming and costly maintenance.