Grade 14.9 Hex Cap Screws Alloy Steel Socket Head Black Galvanizing

Grade 14.9 hex cap screws are commonly used in machine parts, die fixturing, and clamping. The flat socket head enables driving where there is not sufficient space for wrenches or sockets and allows the screw head to sit flush with the surface. 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. Ever Hardware provides custom-made fasteners and customizable packaging.
The property classes of nuts are designated by a number which indicates the maximum appropriate property class of bolt with which they should be fitted. Therefore nut property classes are the same as the bolt designation initial number.
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.

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