What Is SAE Grade 8?

What are the types of bolts?

The principal types of bolts commonly used include:Anchor Bolts.Blind Bolts.Carriage Bolts.Double End Bolts.Eye Bolts.Hex Bolts.Machine Bolts.Penta-Head Bolts.More items….

Is Grade 8 or 10.9 stronger?

Class 10.9 is stronger than class 8.8. It is commonly found in high strength automotive applications. Class 10.9 is similar to grade 8. A low carbon steel for general use.

What is a Grade 8 nut?

A grade 8 bolt is stronger than the more commonly used grade 5. It is made of alloy steel and has six radial lines on the top of the bolt head. Grade 8 bolts have a tensile strength of 150,000 pounds per square inch.

What is SAE grade bolts?

Bolts are made of different grades of steel. … SAE Bolt Grades—The standards for bolt strength grades in the U.S. are set according to a system developed by the SAE (Society of Automotive Engineers.) The SAE marking system uses raised dashes on the bolt head to indicate strength.

Are Grade 8 bolts brittle?

A Grade 8 bolt has a very high tensile strength, but can be brittle. In applications such as suspensions, a very high number of load/unload cycles can produce work hardening, which produces an immediate, or catastrophic failure.

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 the hardest bolt you can buy?

BUMAX® Ultra has proven itself as the world’s strongest bolt – in various highly-demanding critical fastener applications around the world where standard fasteners are simply inadequate.

Is 304 or 316 stainless better?

The most basic difference between grade 304 and grade 316 stainless steels is that 316 tends to have more nickel and a bit of molybdenum in the mix. … Though the stainless steel 304 alloy has a higher melting point, grade 316 has a better resistance to chemicals and chlorides (like salt) than grade 304 stainless steel.

Is grade C the same as Grade 8?

Grade C. Grade C is a thru-hardened medium carbon zinc plated alloy steel. No head markings (manufacturers mark may also be included). Finish is equivalent in strength to Grade 8 but without the yellow color.

What kind of steel is Grade 8?

carbon alloy steelGrade 8 bolts are medium carbon alloy steel, quenched and tempered at a minimum temperature of 800 degrees Fahrenheit. They are then heat-treated to achieve a hardness of 33 to 39 on the Rockwell C scale.

What is the metric equivalent to Grade 8?

Approximate Equivalency Chart Metric/US Roughly Equivalent US Bolt MaterialsMetric Nut ClassSAE J429Normally UsedGrades8.8859.895+10.910or 12812.910or 12.3 more rows

Is stainless harder 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.

What is the difference between a325 and Grade 8 bolts?

A325 bolts are typically manufactured from a medium carbon steel (although they can be made from an alloy) while SAE grade 8 bolts are made from a medium carbon alloy steel. Grade 8 bolts are significantly stronger than an A325. An ASTM specification with similar strength properties to grade 8 is ASTM A490.

Are m10 and 3/8 the same?

Since 10 mm is bigger than 3/8″, the simple answer is, “NO”. But you CAN drill the hole out to either 25/64″ (for 3/8-24) or letter “X” (. 397″)( for 3/8-16), and tap for a Helicoil.

Is b7 the same as Grade 8?

It is also quenched and tempered at 800 F leading to its strength. Grade 8 has 0.28-0.55% carbon, 0.030% max phosphorus, and 0.050% max sulfur….Grade 8.GRADEASTM A193 B7 (Chromium Molybdenum)GRADE 8 (Heat Treated After Threading)YIELD STRENGTH105,000 PSI minimum minimum130,000 PSI minimum2 more rows•Jun 17, 2020

What size is number 8 screw?

In all cases, the larger the number, the larger the size. Consequently a #8 screw is larger than a #4 screw, just as a 3 inch bolt is larger than a 2 inch bolt….Table 1.Threads per InchPitch (inches)Pitch (mm)80.12503.17570.14293.62960.16674.2335.50.18184.61821 more rows

What grade bolt is strongest?

The strongest commercial-quality bolt is grade 8, marked by six raised dashes; its medium-carbon alloy steel has been quenched and tempered to achieve a tensile strength of 150,000 psi.

What grade is a 12.9 bolt?

Table 1.Grade/ClassStrengthMetric Class 4Similar to Grade 2.Metric Class 8.8Similar to Grade 5.Metric Class 10.9Similar to Grade 8.Metric Class 12.9The highest metric class for strength, it exceeds Grade 8.10 more rows