Triangle Bolt Head Marking - Which Side Of Bolt Goes Down?

if you are using them put the beveled side down as the pal nut gets a better grip against a flat surface. On curved washers The beveled side goes down always. We use pal nuts on everything that does not have tension against them like pole top pins and split bolts.

What does 8.8 mean on a bolt head?

If you have ever looked a metric hex bolt you might notice the markings 8.8, 10.9 or 12.9 this does not mean grade 8,10 or 12. The grade 8.8 refers to the tensile strength which is generally 116,000 psi, grade 10.9 is generally 150,000 and grade 12.9 is generally 175,000 psi.

What does a triangle symbol on a bolt head mean?

CoryPad (Materials) 26 Mar 07 15:58. The triangle is the manufacturers identification.

What are the marks shown on the head of a bolt?

Bolt heads and nuts are often marked with numbers, letters, dashes, slashes, dots, or an assortment of other marks. Fasteners commonly have two different markings: a unique manufacturer identification symbol – such as letters or an insignia – and information about the fastener strength.

What is the hardest grade bolt you can buy?

Grade 8 is the hardest, Grade 5 is medium, and Grade 2 is the softest. This is the most common grade of steel fastener and is the least expensive. Grade 2 bolts have no head marking, although sometimes a manufacturer's mark is present. This grade of bolt is made from low or medium carbon steel.

What does 2 marks on a triangle mean?

An isosceles triangle has 2 sides of equal length. The dashes on the lines show they are equal in length. The angles at the base of the equal sides are equal. An equilateral triangle has 3 sides of equal length. The dashes on the lines show they are equal in length.

Is Grade 8 or Grade 5 stronger?

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. Grade G is roughly equivalent to Grade 8.

How do you read bolt markings?

English bolts have radial lines on their head to identify the grade, or strength class. 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.

Does bolt direction matter?

There is no requirement governing the entering direction of the bolt. Some people feel that bolts should be installed with the head up so that a loosened bolt will not fall from the hole. However, a falling nut is nearly as dangerous as a falling bolt, and a bolt without a nut should not be relied on to carry the load.

Which way do bolts go on?

So if you look at the lock nut one side has a tapered crown to it and that's the side that goes up

Are titanium bolts stronger than Grade 8?

Our Titanium Fasteners are Stronger than Grade 8 Steel. Welcome to Smith Ti where are fasteners are stronger that Grade 8 steel. We thought you might like to know why we lead the way in manufacturing the strongest and nicest looking fasteners on the market.

What triangle symbols mean?

Basic Symbolism In most literary pieces, the triangle (with the number three) represents perfectness, unity, and importance. It is the strongest unit.

Why do Grade 5 bolts have 3 marks?

Usually has no markings on the head. Maybe except for just a little manufacturers mark it could also

Is Grade 8 or 8.8 Stronger?

Synopsis: The similarity in names is purely coincidental and the Metric Class 8.8 is not as strong as the Inch Grade 8. As you can see from the table below, a metric Class 8.8 is the equivalent of a Grade 5, not a Grade 8.

Is Grade 8 and 8.8 the same?

Is Class 8.8 the same as Grade 8? A: The answer is no. Class 8.8 is not the same as Grade 8.

Which is stronger 8.8 or Grade 5?

Grade/Class	Strength
Grade 5	Medium strength.
Grade 8	High strength.
Metric Class 4	Similar to Grade 2.
Metric Class 8.8	Similar to Grade 5.

What does a triangle mark mean?

This indicator lets you know that there's a Critical Warning Message that you need to read as soon as possible, but it doesn't actually indicate a specific problem. Really, the triangle with an exclamation point is a catch-all warning light, designed to alert you to issues that your other lights won't catch!

What does the 3 dot triangle mean?

In logical argument and mathematical proof, the therefore sign, ∴, is generally used before a logical consequence, such as the conclusion of a syllogism. The symbol consists of three dots placed in an upright triangle and is read therefore.

What does 10.9 mean on the top of my bolt?

Common metric classes are 5.8, 8.8, 10.9, and 12.9. The higher the numbers are, the stronger the material of the fastener is. The number that appears before the decimal, when multiplied by 100, will provide the approximate minimum tensile strength of the bolt.

What do 3 radial lines on the head of an imperial bolt mean?

SAE J429 (Society of Automotive Engineers) bolts have radial lines, whereas ASTM (American Society for Testing and Materials) uses a combination of letters and numbers to indicate the grade. Three radial lines will indicate an SAE grade 5 fastener, while six radial lines will indicate an SAE grade 8 fastener.