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Nuts have internal machine threads, for use with machine thread bolts and screws.
A standard six sided nut.
A tempered medium carbon steel. Class 8.8 is hardened, but it is not as strong as class 10.9. It is commonly found in automotive applications. Class 8.8 is similar to grade 5. A low carbon steel for general use. Zinc plated for moderate corrosion resistance.
These nuts have smaller outside diameters that meet the old JIS specification. Available only in diameters where there is a difference in size.
A hex nut with a nylon ring to resist loosening.
A nut with an attached free-spinning external tooth lock washer.
A nut with a built in washer. Meets DIN 6923.
A nut with a built in washer which is serrated to resist loosening. Meets DIN 6923.