Metric Hex Head Bolt Torque Specs

Different bolt sizes and grades have different torque specifications.

Metric hex head bolt torque specs.

Unless otherwise specified use torque values listed above. 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. Metric bolts screws nuts. Lubricate all contact areas of the bolts and washers.

Consult your shop manual for the most precise listings. Fasteners bolts nuts and threaded rods torque tension and loads. 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. Improvised torque wrench improvised torque wrench with luggage scale.

Multiply kn by 224 809 to convert nm to lbft. Iso 724 metric threads dimensions of metric threads according iso 724. Metric torque chart for hex head cap screws torque chart for stainless steel cap screws size 316 i n c h 18 8 i n c h 10 1 9 6. Lubricated bolts and reduced torque lubrication effect on bolt tension and torque.

Torque specifications especially for critical joints should. 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. Fastener mart created date. 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.

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. 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. Bolt torque calculator calculate required bolt torque.