What grade is a heavy hex bolt?

The common 18-8 grade is used often. These type of bolts also come with various platings such as zinc, cadmium, or hot-dip galvanized. Heavy hex bolts are required based on a number of different ASTM bolt specifications.

What is a heavy hex bolt?

Heavy hex bolts have a larger head than a standard hex bolt. They are used for bridges, highway, buildings and other construction projects. Heavy hex bolts work well with construction materials such as wood and steel.

What does heavy hex mean?

What is a Heavy Hex Nut? A heavy hex nut is thicker and heavier in weight. The part has a larger diameter across the flats. They also require larger sockets and wrenches when being installed. The load strength is far higher than the standard hex nut, meaning it can bear more weight easily.

What grade is a hex bolt?

Hex bolts (six sided heads) are the industry standard for fasteners with forged heads. ASTM A307 grade A bolts, all SAE hex bolts, and several other common specifications require a standard (finished) hex head.

Is Grade 8 or 12.9 stronger?

Special markings on screw heads and nuts identify the fastener’s grade. Replace a graded fastener with same or higher grade (don’t replace a Grade 8 fastener with a Grade 5 or 2).

Table 1.

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Grade/Class Strength
Metric Class 12.9 The highest metric class for strength, it exceeds Grade 8.

Are Hex bolts strong?

With a tensile strength of 150,000 pounds per square inch, grade 8 hex cap screws are stronger than grade 5.

What is a heavy bolt?

Heavy hex bolts have larger and thicker heads than regular or standard hex bolts, and are commonly used in a wide variety of applications. These building fasteners are available in different sizes, both lengths and diameters, although all come with a hex head.

How much does a hex nut weigh?

Pounds (lbs) per 100 pieces

Size Finished Hex Heavy Hex Jam
5/8″ 7.330 6.960
3/4″ 11.900 11.000
7/8″ 19.000 16.700
1″ 28.300 23.500

What is a Grade 2H nut?

The grade 2H designation signifies nut formation, including the method of heat treatment, quenching, and temperature range required for tempering. … A 2H heavy hex nut is used in high temperatures and greater levels of pressure, with adequate strength and engineering to withstand extreme conditions.

What is the largest hex nut?

Green Bay, Wisconsin: World’s Largest Hex Nut

Built in 2016, it’s 10 feet tall and made of 3.5 tons of stainless steel. You can stand inside its threaded hole for photos.

What is a Grade 5 hex bolt?

Grade 5 heavy hex bolts are externally threaded fasteners made of carbon steel. … These bolts are fully threaded or partially threaded depending on the length with a six sided, hexagonal head. The ASME standard covers hex bolt dimensional specifications designated by ASME B18.

What is a Grade 8 hex bolt?

Grade 8 hex bolts are made from medium carbon alloy steel and heat treated. A Grade 8 hex bolt has a greater tensile strength than a Grade 5 and Grade 2 hex bolt. … The length of a hex bolt is determined by measuring from under the head of the bolt to the base of the threads.

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How do you tell the grade of a bolt?

You can usually figure out the grade, or strength, of a bolt by looking at the markings on its head. English bolts (U.S.S. or S.A.E) are categorized by grade, from grade 2 to grade 8, where the grade represents inch strength. The higher the grade, the stronger the bolt.

What grade are black bolts?

The colour black, referred to the fact the steel used to make the bolts was not finished with any corrosion protection, although zinc plating is a common finish for durability. The grade 4.6, relates to the strength of the bolts.

Are stainless bolts stronger than Grade 8?

Stainless steel bolts are rated for corrosion resistance. Bolt strength is rated in PSI (pounds per square inch). A stainless steel bolt has the same PSI rating as a grade 5 bolt (125,000 PSI). A grade 8 bolt has a stronger rating with a PSI of 150,000.