Web15 rows · Feb 15, 2024 · English bolts have radial lines on their head to identify the grade, or strength class. The ... WebGrade 5 bolts are made of medium-carbon steel and have a tensile strength of at least 120,000 PSI. Grade 8 bolts are made of alloy steel and have a tensile strength of at least 150,000 PSI. Alloy steel bolts are very strong and are used in demanding applications such as in automobiles and industrial machinery. Three Systems of Bolt Grades

Grades of Bolts - The Home Depot

WebNever replace a graded hex bolt with a lower grade or lower strength—do not substitute a stainless steel or silicon bronze bolt for a Grade 5 or 8 bolt, or a brass bolt for a Grade 2, 5 or 8 bolt. Head markings identify the grades: A307 is usually identified as 307A or 307B, no lines is Grade 2, three radial lines 120° apart identifies the ... WebSep 22, 2014 · Grade 5 bolts have three evenly spaced radial lines on the head. Grade 8 This grade of bolt is made of medium carbon alloy steel that has been quenched and … swot for electric scooter

Fasteners Flashcards Quizlet

WebJun 30, 2009 · Razorman, A grade 5 bolt will have 3 lines on it's head, it will also read JH on the head. A grade 8 bolt has 6 lines on it's head and they are usually a different color than silver. I have seen two different brands of grade 8 bolts one brand is gold colored and the other brand is almost black. Quote Razorman Banned 634 Certified Captain of Crush WebThe two nuts on the left in Figure 2 have markings that are 120 degrees apart, similar to the lines on the head of an SAE Grade 5 bolt, so that is their strength level. Similarly, the … WebNov 12, 2024 · In the image below, the middle bolt has 3 radial raised lines. That’s a grade 5 bolt. The goldish one has 6 radial raised lines. That’s a grade 8 bolt. Other markings on the bolt don’t really matter (for bolts 101). The Grade 2 bolt is on the left. This one has several letters that tell details, but there are no radial marks. texters frankly speaking