Iso 724 metric threads dimensions of metric threads according iso 724.
M8 cap head bolt torque.
Of the bolt proof loads specified for sae j 429 grade 5 and astm a 449 bolts.
Tightening torque for class 4 6 bolts metric coarse bolt diameter x pitch thread stress area mm2 tightening torque nm pre load kn tightening torque nm pre load kn m5 x 0 8 14 2 1 9 2 74 2 59 2 4 m6 x 1 20 1 3 3 3 87 3 65 4 1 m8 x 1 25 36 6 8 7 1 6 7.
In threads per inch 307a astm a307 grade a sae j429 grade 5 sae j429 grade 8 f n l g 9 fnl grade 9 clamp load lbs tightening.
Proper torque spec varies depending on the material bolt grade or wether lubrication is used such as oil wax or anti seize always go to the manufacturer for proper torque specs if needed.
American national standard socket head cap screws metric series per.
M8 x 1 25 pitch 8 8 25 0 23 0 18 75 17 25.
A m30 12 9 fastener has a maximum tightening torque of 2 280 nm based on a friction coefficient of 0 125 zinc plated maximum torque.
M8 1 25 36 60 32 80 44 65 35 50 24 01 39 8 27 8 m10 1 50 58 00 52 30 70 76 56 26 38 28 78 8 55 1.
In general the proper torque spec is usually around 65 70 of the failure torque rate.
The below chart refers to usage in steel.
2 280nm 123 or 117.
Lubricating the bolts is the suggested method.
Lubricated bolts and reduced torque lubrication effect on bolt tension and torque.
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 6 40 12 7 12 1.
When so specified by the purchaser the edges of holes on the outside surface of the head will be chamfered 45 degrees to a depth of 0 30 to 0 50 mm.
Lubricate all contact areas of the bolts and washers.
Fasteners bolts nuts and threaded rods torque tension and loads.
Tightening torque tensile yield shear strength socket head cap screw socket head cap screw recommended tightening torque class 12 9 size pitch stress area core area tensile strength.
Bolt torque calculator calculate required bolt torque.
Torque tension reference guide printed in u s a.
Supply part number.
