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How do you know what grade a screw is?
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.
How do you determine the grade of a hex bolt?
SAE Hex Cap Screw Grades These markings are standard. For example, all grade 5 bolts will have three radial lines on the head. All grade 8 bolts will have six radial lines on the head.
What are Grade 5 screws?
Grade 5 bolts are hardened to increase strength and are the most common bolts found in automotive applications. Grade 5 bolts have 3 evenly spaced radial lines on the head. Grade F is roughly equivalent to Grade 5. Grade F nuts are used with Grade 5 bolts.
What does 10.9 mean on a hex 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. Navstar Steel is a leading supplier and manufacturer of the Grade 10.9 Bolt products in various dimensions and types.
What is a Grade 5 hex bolt?
Grade 5 Hex Bolt Products Heavy Hex Bolts are externally threaded, forged fasteners with a six-sided head that is wider than that of a standard hex bolt. They offer a greater wrenching area than standard hex machine bolts. Used mostly in heavy duty industrial applications.
What is the difference between Grade 5 and Grade 2?
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.
Are Grade 10 bolts stronger than Grade 8?
Each grade has a specific bolt strength. No matter the system used to grade the bolts, the higher number means the stronger the bolt. For most home and automotive applications, you won’t need anything more than a grade 8 bolt strength or metric class 10.9.
What is a Grade 2 hex bolt?
Grade-2 Hex Cap Screws are made from a low or medium carbon steel and is an economical choice for use in non-critical applications where the screw is not subject to extreme temperatures or stress.
Is class 10.9 the same as grade 8?
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.
How accurate is this weight calculator for Hex Bolts?
Hex Bolt Weight & Rate Calculator Metric Sizes Inch Sizes Conditions: Accuracy of this weight calculator is upto 95% This tool is for estimation purpose only. Only use this if you know about the hex bolts’ sizes.
Are hex bolts and hex cap screws the same thing?
However, make sure you are comparing apples to apples, because “Hex Bolts” and “Hex cap screws” are different! Lightning Bolt has many people that contact us which interchange the names of hex cap screws and hex bolts as they are synonymous… they are not. Hex bolts are “less precise” and therefore cheaper than hex cap screws.
What are the grades of metric bolts and screws?
Metric bolt grades and strength calculator to show proof strength, tensile strength, Vickers / Brinell hardness, minimum breaking torque and stress area of metric bolts and screws made of carbon steel and alloy steel with designations 4.6, 4.8, 5.8, 8.8, 9.8, 10.9 and 12.9. Some notes from ISO 898 metric screw threads standards:
How to identify grade 5 Hex Cap Screws?
Therefore, all you have to do is look at a hex bolt dimensions chart and you will find everything you need to know. And regardless if you are looking for a grade 5 hex cap screw or a grade 8 hex cap screw, their dimensional measurements will be identical.