Easy to use Carriage Bolt It’s NOT a coating. It’s Science Package Dimensions: 6 L x 6H x6W(inches)

ANSI B18.5, 18-8 stainless steel, carriage bolt, thread 1/4"-20,max. Dia head .594", max. ,Head height.145", max sq. Depth .156", max. Sq width .260 , fully threaded,treaded with nl-19 surface treatment,.