What size is a Grade 8 bolt?
The nominal size of the grade 8 bolts can be from 1/4″ to 1 1/2″. The minimum yield strength of this grade bolt is 130,000 psi. A maximum of 120,000 psi of tensile force (proof load) can be applied to grade 8 bolts.
What is the smallest grade 8 bolt?
Grade 8 Bolts: Quick Facts
| Grade | Nominal Size Diameter/Inches |
|---|---|
| Grade 8 6 Radial Lines | 1/4″ thru 1 1/2″ |
What color is a Grade 8 bolt?
yellow
The grade 8 steel hex bolt has a zinc yellow-chromate plated finish and an external hex drive, meets American Society of Mechanical Engineers ASME B18. 2.1 and Society of Automotive Engineers SAE J429 specifications, and is made in USA.
How do you identify a Grade 8 bolt?
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.
What are grade 8 bolts used for?
Grade 8 fasteners are considered hi-strength / high-tensile fasteners and are used in many highly industrial applications such as machinery, valves, pumps, vessels, motors, tractors, and even tanks… Although it may seem like a bolt is a bolt, there are significant differences in how each bolt is manufactured.
How do you identify 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.
Is a Grade 8 bolt stronger than stainless steel?
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 kind of threads are used in Grade 8 bolts?
Often used on heavy equipment, such as plows, they have a head that’s angled underneath to sit flush within countersunk holes. These are Grade 8 threaded rods. Choose these locknuts to fasten standard metric threads. They’re Class 8 steel, so they can be used in most fastening applications.
What kind of flanges are used for hex heads?
High-Strength Grade 8 Steel Flanged Hex Head Screws Made from Grade 8 steel, these screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws. The flange distributes pressure over the surface, eliminating the need for a washer.
What do you use grade 8 steel for?
The square neck keeps these bolts from turning when tightening a nut. Made from Grade 8 steel, these screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems.
What kind of nuts are made of Grade 8 steel?
Made from Grade 8 steel, these nuts are about 25% stronger than medium-strength steel coupling nuts. Furnished in inch thread sizes. These assortments include hex head screws and hex nuts.
