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.

Metric hex head bolt torque specs.

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 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. Different bolt sizes and grades have different torque specifications. Fasteners bolts nuts and threaded rods torque tension and loads.

Improvised torque wrench improvised torque wrench with luggage scale. Lubricated bolts and reduced torque lubrication effect on bolt tension and torque. Lubricate all contact areas of the bolts and washers. Lubricating the bolts is the suggested method.

Unless otherwise specified use torque values listed above. Bolt clamp loads. 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. 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.

Torque specifications especially for critical joints should. Torque tolerance 0 15 of torquing values. 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. Bolt torque calculator calculate required bolt torque.

Multiply kn by 224 809 to convert nm to lbft. Fastener mart created date. Iso 724 metric threads dimensions of metric threads according iso 724.