Metric Hex Head Bolt Torque Specs

Class 4 6 iso metric coarse pitch bolts screws bolt tension recommended corresponding to assembly 65 of proof load torque kn nm 0 19 0 06 0 31 0 12 0 50 0 25 to convert kn to lbf.

Metric hex head bolt torque specs.

5 8 8 8 10 9 class 5 8 class 8 8 class bolt head identification bolt size grade 2 grade 5 grade 8 metric bolt head identification bolt size inches. Bolt clamp loads. Lubricated bolts and reduced torque lubrication effect on bolt tension and torque. Torque specifications especially for critical joints should.

Multiply nm by 0 737562 0 73 0 44 1 29 1 00 2 08 2 1 2 94 3 5 5 34 8 5 8 45 17 12 4 30 16 8 47 22 9 73 28 1 101 35 8. Unless otherwise specified use torque values listed above. Torque tolerance 0 15 of torquing values. Fasteners bolts nuts and threaded rods torque tension and loads.

Metric bolts screws nuts. Consult your shop manual for the most precise listings. For example 6 mm bolts with a 10 9 grade have a maximum torque value of 10 foot pounds while the same size bolts with a 12 9 grade have a maximum torque value of 12 foot pounds. Fastener mart created date.

Service manual supplement july 2016 fastener torque specifications 4 sae and metric fastener torque specifications sae plain and zinc plated hex and socket head cap. Lubricating the bolts is the suggested method. Lubricate all contact areas of the bolts and washers. Iso 724 metric threads dimensions of metric threads according iso 724.

Steel grade sae 5 sae 8 socket head cap screws property class 8 8 10 9 12 9 socket head cap screw torque in pound foot or pound inch torque in newton meter nm lubed means cleaned dry bolts lubricated with standard medium viscosity machine oil. Multiply kn by 224 809 to convert nm to lbft. Different bolt sizes and grades have different torque specifications.