A standard hex nut , also referred to as a finished hex nut , has a smaller width across the flats herepared to a heavy hex nut , and a heavy hex nut is slightly thicker than a standard hex nut of the same nominal size. In fact, heavy hex nuts are exactly a 1/8” larger across the flats than a standard hex nut in all sizes, Mar 28, 2012 Differences Between A Finished Hex Nut And Other Nuts • Heavy Hex Nuts – made with a thicker wall, this type of nut can handle heavy loads, hence the name ‘ heavy hex ’ • Thick Nuts – unlike heavy hex nuts , which are formed using a thicker wall, Hex Bolt and Heavy Hex Bolt Dimensions are shown in the following hex bolt dimensions chart according to ASME B18.2.1-2010 standard.. Hex bolt is a bolt with a hexagonal head shape and generally used in construction works of buildings, railways, bridges, factories, etc.

Heavy hex nuts are slightly larger and thicker than standard (finished) hex nuts . There are numerous grades and the heavy pattern is typically used for large diameter and high strength bolts. See our nut compatibility chart to herepatible heavy hex nut (s) for a specific grade of bolt. Since hot-dip galvanizing typically adds 2. In a snug hole, a standard machine nut will develop the full strength. In a tensile test to failure, usually the head flies off. Violently. Heavy Hex pattern is for holes that are not 'snug' like structural steel beams columns, and pipe flanges. Jan 24, 2011 Heavy hex bolts are required based on a number of different ASTM bolt specifications. In the chemical and petroleum industries, the A193 specification calls for heavy hex bolts and nuts in high heat conditions. The A320 standard covers extremely low temperature conditions and requires the use of heavy hex bolts.

Heavy Hex nuts teCHnICaL Data sHeet nuCOR FasteneR Heavy Hex Structural Nuts are manufactured to ASTM A563, ASTM A563M and ASTM A194 specifications and are designed to be stronger than the bolts with which they are assembled. Heavy hex nut dimensions in inches are covered in ASME B18.2.2 Square and Hex Nuts , however, the dimensions in matrix unit are covered in ASME B18.2.4.6M Heavy Hex Nuts . Here, I have listed the Heavy hex nut dimensions as per ISO and UNC. A six-sided internally threaded fastener which is both thicker and wider across the flats than a same-sized finished hex nut , made of 18-8 stainless. Nuts in sizes 7/16 smaller shall be double chamfered. Larger sizes are either double chamfered or chamfered on top with a washer faced bearing surface.