19 rows US Bolts : Head Marking Grade and Material Nominal Size Range (inches) Mechanical Properties ; Proof Load (psi) Min. Yield Strength (psi) Min. Tensile Strength Grade 5 fasteners, like most grades , have a standard thread length of twice the diameter plus 1/4″ for bolt lengths less than or equal to 6″ and twice the diameter plus 1/2″ for bolt lengths 6″ and longer. Choose from our selection of grade 5 bolts , including over 800 products in a wide range of styles and sizes. In stock and ready to ship.

Zinc plated grade 5 steel. Coarse (standard) thread; Fine thread; . Hex bolts, Zinc plated grade 5 steel. Hex bolt diameter is measured on the outside of the threads. Resources. US Hex bolt sizes (opens in new window/tab) Head/Wrench size table . A bolt with a six sided head. Grade 5 Bolts are equivalent to Metric 8.8 bolts , so when finding the right bolt , be sure to match the grades on the bolts being used. Grade 5 bolts can often be identified by the 3 marks on the head. Shop our selection of 5 . 5 , Hex Bolts in the Hardware Department at The Home Depot.