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.

Torque tolerance 0 15 of torquing values. 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. 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. Metric bolts screws nuts. 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. Lubricated bolts and reduced torque lubrication effect on bolt tension and torque.

Lubricate all contact areas of the bolts and washers. Different bolt sizes and grades have different torque specifications. Torque specifications especially for critical joints should. Lubricating the bolts is the suggested method.

Unless otherwise specified use torque values listed above. Fastener mart created date. Bolt torque calculator calculate required bolt torque. Iso 724 metric threads dimensions of metric threads according iso 724.

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. Fasteners bolts nuts and threaded rods torque tension and loads. Multiply kn by 224 809 to convert nm to lbft.