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A grade 5 hex bolt has 3 radial lines formed into the top of the head. Bolt manufacturers can provide listings of bolt markings and their corresponding strength ratings.

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Is a grade 5 bolt the same designation as a SAE -sized bolt?

SAE sets standard sizes and grades for bolts.Size and Grade are different:Size is set By the SAE (society of Automotive engineer's) and is stated as thickness followed by thread pitch followed by length 1/4 x 24 (threads per inch) x 1 1/14 (inches long) Grade Is a statement of strength and hardness. Most auto hardware tends to be grade 5 and some high strength stuff is grade 8 or grade 12


Hardness of grade 5 bolts?

A grade 5 hardness bolt is a bolt made of medium carbon steel and depending on the manufacturer can either be or not heat treated.


Is a grade 8 bolt stronger than a grade 5 bolt?

Yes, a grade 8 bolt is stronger than a grade 5 bolt. Grade 8 bolts are made from a higher strength steel and have a higher tensile strength, typically around 150,000 psi, compared to grade 5 bolts, which have a tensile strength of about 120,000 psi. This makes grade 8 bolts more suitable for high-stress applications. Additionally, grade 8 bolts are often used in demanding environments where greater strength and durability are required.


What does the grade of stainless steel mean?

grade refers to composition and strength. Generally a higher Grade ( number or alphabet) is a stronger material. For example Grade C is stronger than Grade A Grade 8 bolt is stronger than grade 5 bolt.


What is the number on the head of the bolt mean.Please give examples.?

It signifies the grade of a bolt. For a load bearing bolt where it's failure could cause injury or damage, you should use a high grade bolt. 5-9 are higher grades.


What size is the bolt holding blades on JD L108 mower?

The bolt holding the blades on a John Deere L108 mower is typically a 5/8-inch diameter bolt. It's important to use the correct grade of bolt, usually a Grade 5 or Grade 8, to ensure durability and safety. Always refer to the owner's manual for specific maintenance guidelines and torque specifications.


What grade is a bolt with hardness Rc 27-34?

A bolt with hardness Rc 27-34 falls under the Grade 5 category. Grade 5 bolts are medium carbon steel that is quenched and tempered for increased strength and hardness. They are commonly used in automotive and general engineering applications.


What is m16 grade 8.8 bolt?

A bolt.


What is SAE Grade of Bolt?

SAE grade of a bolt refers to the classification system established by the Society of Automotive Engineers (SAE) that indicates the strength and material properties of the bolt. The grades range from 1 to 8, with higher numbers indicating stronger bolts, typically made from alloy steel with specific heat treatment processes. Each grade has a specified minimum tensile strength, which helps in determining the appropriate bolt for various applications. Common grades include Grade 2, Grade 5, and Grade 8, with Grade 8 being the strongest.


What is a stronger bolt grade 8 or 18-8 stainless?

a grade 8 bolt is stronger, about twice as strong.


What does the grade 8.8 bolt identification refer to?

he diameter of the bolt.


How is the grade strength of a bolt determined?

If there are lines coming inward from the outside on the head then this is an SAE bolt, not metric. If there are three of these lines than it is a grade five bolt.