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.
M8 cap head bolt torque.
Supply part number.
Torque tension reference guide printed in u s a.
American national standard socket head cap screws metric series per.
Fasteners bolts nuts and threaded rods torque tension and loads.
Resulting maximum pre load for standard hex head bolts and socket head cap screws based on.
Iso 724 metric threads dimensions of metric threads according iso 724.
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.
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.
The below chart refers to usage in steel.
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.
M8 x 1 25 pitch 8 8 25 0 23 0 18 75 17 25.
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.
2 280nm 123 or 117.
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.
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.
In general the proper torque spec is usually around 65 70 of the failure torque rate.
Lubricating the bolts is the suggested method.
Improvised torque wrench improvised torque wrench with luggage scale.
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.
Lubricate all contact areas of the bolts and washers.
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.
