How do I identify my bolt manufacturer?

How do I identify my bolt manufacturer?

Industry standards require two types of marks on the head of the bolt. They are the name of the manufacturer and a grade mark that identifies the material properties. Bolts and nuts come in many different sizes. A raised mark on the head of a bolt indicates the strength and type of steel used during manufacturing.

What do the letters on a bolt head mean?

The three-letter code is the manufacturer code (for example, HKT stands for Hau Kwang Enterprises) and the numbers (if metric) or radial lines (if SAE) refer to the bolts’ strength. If there are no numbers or lines present, assume the bolt is no better than a grade 2 (low strength).

What is a 10.9 JH bolt?

Grade 10.9 Bolt is a high tensile bolt. These are made up of carbon steels and low boron steels. The material is heat treated by quenched and tempered methods. The bolts are produced in a way that they have high tensile strength.

What does B on a bolt head mean?

Grade B bolts and studs have a tensile strength between 60ksi and 100ksi. Their intended use is in flanged joints in piping systems with cast iron flanges.

What does 6 marks on a bolt head mean?

You can usually figure out the grade, or strength, of a bolt by looking at the markings on its head. The number of lines on the bolt head is 2 less than the actual grade. So, for example, a grade 5 bolt will only have 3 radial lines on its head. A grade 8 bolt will have 6 radial lines on its head.

What does 6 markings on a bolt head mean?

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. A grade 8 bolt will have 6 radial lines on its head.

How strong is a Class 10.9 bolt?

Used in automotive applications and for bolting large and forged parts, metric 10.9 bolts exhibit high tensile strength and good wear resistance. Our metric grade 10.9 bolts meet ASTM A324 grade BD and SAE J429, grade 8 standards. The yield strength of the bolts is 940 and the tensile strength is 1040 MPa.

What does 8.8 on a bolt head mean?

A property class (PC) is the metric equivalent of a grade in inch series terminology. So, in English, a PC 8.8 bolt is a bolt with a nominal tensile strength of 800 MPa and a nominal yield strength that is 80% of the bolt’s nominal tensile strength, or 640 MPa.

What does 8.8 mean on the head of a bolt?

So, in English, a PC 8.8 bolt is a bolt with a nominal tensile strength of 800 MPa and a nominal yield strength that is 80% of the bolt’s nominal tensile strength, or 640 MPa.

What does the on a bolt head mean?

bolt head. noun. 1 : the head of a bolt. 2 : matrass. 3 : the end of a rifle bolt that seats the cartridge in the chamber.

Who makes JH bolts?

About JH Botts. Established in 1973, J. H. Botts, LLC. is a valuable source to many industries. Our manufacturing facility in Joliet, Illinois was built in 1995 and house a variety of threading and manufacturing equipment. We stock a majority of the standard size bolts used in the roadway lighting industry, along with bolts for…

What is the size of a bolt head?

A 1/2 – 24 UNF bolt is an American standard bolt 1/2-inch in nominal diameter, 24 threads per inch, with a united national fine thread. For both metric and standard bolts, the head size is the distance across the flats. For standard bolts, the head size is measured in inches or fractions of an inch.