The thread is smooth and flat, the squat is evenly stressed, and the screw teeth are stronger. The square neck is conveniently caught in the groove during the installation process, and can prevent the bolt from rotating during installation; 2.Due to the head of the carriage bolt, there is no groove type that can be used with a power assisting tool such as a cross recess or a hex socket Not easy to slip when installed. Hex Bolts 5/16-18 X 3/4 Coarse , Zinc Plated Steel – Pack Of 100 For DIY, Automotive, Farm, And General Use 5/16-18 X 3/4 Coarse Thread Zinc Plated Corrosion Resistant Bolts 1/4-20 X 1 Carriage Bolts 15 Sets 1/4-20 X 1" Carriage Bolts With Machine Bolts Precision forged, acid and alkali resistant, corrosion resistant and resistant to oxidation. Product: Carriage Bolts; Material: 304 Stainless Steel; Dimension: M6x12mm; Thread Length: 8mm / 0.31" Designed with a round head, square neck and 304 stainless steel material It can also be hidden during actual use to prevent disassembly. Due to the head there is no groove type that can be used with a power assisting tool.
