So typically grade eight, in most cases, is coated in yellow zinc. You can see this bolt, it’s coated with a yellow zinc. These are typically, grade eights, are heated to temperatures of 800 degrees. These are very commonly used in situations where you need a very strong bolt.
Are zinc bolts Grade 5?
Grade 5 Bolts and fasteners are made of medium strength carbon steel and are specified under the Society of Automotive Engineers (SAE). … Grade 5 bolts can often be identified by the 3 marks on the head. Each Grade 5 bolt from U-Bolt-It are available zinc plated.
What grade are Home Depot zinc bolts?
Zinc-Plated Grade 8 Hex Bolt.
Are zinc bolts Grade 8?
Grade 8 Yellow Zinc Fasteners – Nuts, Washers, Bolts & Screws. These fasteners are heat treated to harden the metal. Grade 5 Zinc Fasteners are partially treated, whereas our stock of Grade 8 Yellow Zinc fasteners are thru heated to maximize its hardness.
What is the difference between Grade 2 and Grade 5 bolts?
Grade 2 is a standard hardware grade steel. This is the most common grade of steel fastener and is the least expensive. Except a possible manufacturer’s mark,Grade 2 bolts have no head marking. Grade 5 bolts are hardened to increase strength and are the most common bolts found in automotive applications.
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 is the difference between Grade 5 and Grade 8 bolts?
Grade 8 bolts have been hardened more than grade 5 bolts. Thus they are stronger and are used in demanding applications such as automotive suspensions. Grade 8 bolts have 6 evenly spaced radial lines on the head.
What is a Grade 5 bolt?
Grade 5 bolts are case hardened, meaning the bolt has been heated enough to hardened the outside of the bolt but not enough to harden the inside portion. Grade 5 bolts are identified by 3 evenly spaced radial lines on the head.
Are Grade 5 bolts stainless?
Stainless Steel Grades & Strength
Stainless commonly comes in grades 18.8 (304) or T316. Stainless steel bolts are rated for corrosion resistance. … 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.
What is the strength of Grade 8 bolts?
A grade 8 bolt is the highest grade SAE bolt. Grade 8 bolts have a minimum tensile strength of 150,000 PSI. As a comparison, the ASTM A325 bolt is roughly equivalent to the SAE grade 5.
Do they make Grade 8 carriage bolts?
High-Strength Steel Square Neck
Smooth domed heads feature a square shoulder underneath that pulls into the material to prevent spinning during installation of these right-handed (RH) threaded carriage bolts. Grade 8 alloy steel is a high-strength material for demanding applications.
Is zinc plated and galvanized the same?
Galvanisation is when a protective zinc coating is applied to steel or iron, to prevent rusting. … This is when metal parts are fully submerged in a bath of molten zinc. Zinc plating (also known as electro-galvanising) is a process where zinc is applied by using a current of electricity.
Are Grade 8 bolts galvanized?
No. You may find galvanized bolts sold as grade 8 but they will not pass qualification tests. Galvanizing causes hydrogen embrittlement in high strength steel. That will reduce the strength of the product below standard.
What kind of steel are Grade 8 bolts made of?
Grade 8 (SAE J429) is a medium carbon alloy steel with one of the highest tensile strengths available. With a minimum tensile strength of 150 ksi and a minimum yield of 130 ksi, Grade 8 has a higher tensile and yield strength than other steel grades such as Grade 5 and B7.
What grade is a metric 8.8 Bolt?
A tempered medium carbon steel. Class 8.8 is hardened, but it is not as strong as class 10.9. It is commonly found in automotive applications. Class 8.8 is similar to grade 5.