M8-1.25 Grade 14.9 DIN 912 ISO 4762 Screw Hexagon Socket Cap Bolt

Description

M8-1.25 Grade 14.9 DIN 912 cap bolt has a 8.0mm diameter external thread that commonly used in machine parts, die fixturing, and clamping. The socket head enables driving where there is not sufficient space for wrenches or sockets. Ever Hardware provides custom made fasteners and customizable packaging.

The symbol for the property classes of hex bolts, screws and studs consists of two numbers separated by a decimal point. 8.8, 10.9, 12.9, 14.9 etc.
Take the whole number before the decimal point of M8-1.25 Grade 14.9. This number, when multiplied by a hundred, gives you the nominal tensile strength in newtons per millimetre squared.
The digit following the decimal point, multiplied by ten, gives you the yield stress ration, or the percentage ratio between the lower yield stress and the nominal tensile strength.
If you now multiply the first number by 10 times the second number you will arrive at the notional yield stress in newtons per millimetre squared.
Internationally, mechanical stress is expressed in newtons per square area, in bolting N/mm2. Common practice overseas is to use the unit megapascal (MPa), which corresponds directly to N/mm2. For example 1,200 N/mm2 = 1,200 MPa
An example using a hex bolt with property class 10.9
The Nominal tensile strength of a 10.9 bolt is calculated 10 x 100 = 1,000 N/mm2 (MPa)
The Yield stress ratio 9 x 10 = 90%
The Yield stress is therefore 90% of 1,000 = 900 N/mm2 (MPa)
Bolts and Studs can be supplied in Property classes Grade 3.6 Grade 4.6 Grade 4.8 Grade 5.6 Grade 5.8 Grade 6.8 Grade 8.8 Grade 9.8 Grade 10.9 Grade 12.9 Grade 14.9
Nuts Property classes Grade 6 Grade 8 Grade 9 Grade 10 Grade 12 Grade 14