Supply part number.
M8 cap head bolt torque.
American national standard socket head cap screws metric series per.
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.
The below chart refers to usage in steel.
Of the bolt proof loads specified for sae j 429 grade 5 and astm a 449 bolts.
Torque tension reference guide printed in u s a.
Fasteners bolts nuts and threaded rods torque tension and loads.
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.
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.
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.
2 280nm 123 or 117.
Improvised torque wrench improvised torque wrench with luggage scale.
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 general the proper torque spec is usually around 65 70 of the failure torque rate.
Iso 724 metric threads dimensions of metric threads according iso 724.
Lubricating the bolts is the suggested method.
Resulting maximum pre load for standard hex head bolts and socket head cap screws based on.
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.
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.
Lubricate all contact areas of the bolts and washers.
M8 x 1 25 pitch 8 8 25 0 23 0 18 75 17 25.
Bolt torque calculator calculate required bolt torque.
