Grade 8 Bolts: sheer strength in a 5/8 size.
Grade 8 Bolts: sheer strength in a 5/8 size.
(OP)
Hello,
I am trying to figure out if the grade 8 bolts in my suspension setup have a determined sheer strength. I want to determine what type of suspension loading could occur before I sheer off the bolts.
I have a feeling that under no circumstances will I be able to sheer these bolts... but I just want to be sure.
If any one had a link to a table of sheer strengths... or maybe some info, that would be great. I searched and only found tensile strength on most of the web.
I am trying to figure out if the grade 8 bolts in my suspension setup have a determined sheer strength. I want to determine what type of suspension loading could occur before I sheer off the bolts.
I have a feeling that under no circumstances will I be able to sheer these bolts... but I just want to be sure.
If any one had a link to a table of sheer strengths... or maybe some info, that would be great. I searched and only found tensile strength on most of the web.





RE: Grade 8 Bolts: sheer strength in a 5/8 size.
RE: Grade 8 Bolts: sheer strength in a 5/8 size.
RE: Grade 8 Bolts: sheer strength in a 5/8 size.
For Diameter 5/8" (16mm) Shear strength is 30 kN when threads are included in the shear plane and 40 kN when treads are excluded from the shear plane.
I,m using Allowable Stresses here.
Hope it helps.
RE: Grade 8 Bolts: sheer strength in a 5/8 size.
Grade 8 refers to parts made according to standards like SAE J 429, Mechanical and Material Requirements for Externally Threaded Fasteners, or ASTM A490, Standard Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength, which use inch-pound units. Grade 8 is similar to Property Class 10.9 according to ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws and studs. As for an 8.8 part having a shear/tensile ratio of 210/800, that is not supported by my experience or references. A value of 0.6 is listed in VDI 2230, Systematic Calculation of High Duty Bolted Joints and SAE Technical Paper 770420, Analysis and Design of Threaded Assemblies.
RE: Grade 8 Bolts: sheer strength in a 5/8 size.
Do not confuse the SAE "Grade 8" hardware (150 ksi UTS; 130 ksi Yield) with Metric "Grade 8.8" hardware (116 ksi UTS; 93 ksi Yield).
RE: Grade 8 Bolts: sheer strength in a 5/8 size.
RE: Grade 8 Bolts: sheer strength in a 5/8 size.
Interesting comments. Can you provide a derivation or reference for your numbers?
RE: Grade 8 Bolts: sheer strength in a 5/8 size.