Metric Fastener Grades & Strengths Explained!! (Class 4.6, 8.8, 10.9, & 12.9)

[@jacoirone]

Those are megapascals (MPa) not millipascals...

[@david-m-creations799]

#walleyecheatersbusted We got weights-n-fish👀😳

[@Siper2]

Great video man, very helpful!

[@hfawad123]

Just an FYI; its megapascal not millipascal. if it was millipascal it would be 1/1000 of a pascal in lieu of 1000000 pascals (1Mpa).. thanks

[@don.timeless4993]

i'm doing a DIY major maintenance to my hyundai azera & i want my work to be pro. so i'm going to fasten with the proper torque by a meteric fasteners table providing torque for every diameter. the problem is this metric table is asking for the class\garde of the fasteners & the fasteners is only having the number of the diameter on it only! so how to know the grade? is it by the color? or should i do the lower torque for the lower grade to be in the safe side? but i'm afraid it wont tight things properly!

[@Mike-qo4kp]

Can a harmonic balancer bolt that is grade 10.9 be upgraded to a 12.9 grade? Why or why not?

[@NNGplayz]

Why we use 8.8 bolt over 10.9 and 12.9 in iron and steel making industries?

[@firattaskale]

cost

[@EliezerSantiago-qo2gn]

Good morning, I am having a really had time finding a 10.9 bolt of the size I need. Can I use a grade 8 bolt for a car suspension application?

[@nangoromit193]

Can we have bolts of different diameters but same gade

[@BoltsandNutscom]

100%

[@mimamaanno6535]

@@BoltsandNutscom The tensile strength describes the maximum mechanical tensile stress that the material can withstand before it breaks. In this case, it is given in Newtons per square millimeter (N/mm²). However, the tensile force given for the strength class is reduced by a factor of one hundred. An 8.8 screw therefore has a tensile strength of 800 N/mm². This means that an M8 screw = 50.27 mm² with 8.8 has a force of 50.27 mm² x 800 N/mm² = 40216N = 40.216kN.

[@joansparky4439]

​ @ mimamaanno6535 I was under the impression for tensile stress the core (minor) diameter was to be used and not the nominal? An M8x1.25 (standard pitch) would have a core diameter of about 80% of the nominal and resulting in 36.6mm^2 only.. not 50.3mm^2.

[@david-m-creations799]

#walleyecheatersbusted We got weights-n-fish👀😳