Machine Screw Nuts in Zinc Plated Steel

Hex Finish Nuts for Diameters Under - 1/4"

A machine nut is used with machine screws to connect materials together mechanically. This type of nut is used with smaller machine screw sizes under 1/4". Hex Machine nuts are used for many fastening applications. Machine screw nuts are often used with hex cap screws, socket screws, and bolts.

Small Diameter Machine Screw Nuts

A machine screw small pattern nut (micro) is used with machine screws to connect materials together in small tight areas mechanically. Small Pattern Machine Screw Nuts have a smaller outside diameter than standard Machine Screw Nuts. For example, a #0-80 Machine Screw Nut has 5/32 (0.15625) inch flats, whereas a #0-80 Small Pattern Machine Screw Nut has 1/8 (0.125) inch flats.

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Zinc is by far the most common and ecnomical type of plating for fasteners. The zinc plating adds a protective "sacrifical" top layer against corrosion while also adding a shiny finish to the machine screw nuts. Zinc plated fasteners are ideal for indoor use where they won't be constantly exposed to harsh elements.

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Machine Screw Nut Specifications - Standard Sizes

Nut Sizes	Flats	Thickness
#2	3/16"	1/16"
#3	3/16"	1/16"
#4	1/4"	3/32"
#5	5/16"	7/64"
#6	5/16"	7/64"
#8	11/32"	1/8"
#10	3/8"	1/8"
#12	7/16"	5/32"

Machine Screw Nut Specifications - Small Sizes

Nut Sizes	Flats	Thickness
#4	3/16"	1/16"
#6	1/4"	3/32"
#8	5/16"	7/64"

Machine Screw Nut Specifications - Extra Small Sizes

Nut Sizes	Flats	Thickness
#8-32	1/4"	3/32"

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FAQs

Do machine screws need nuts?

Machine screws typically only need nuts if the hole they are being fastened into isn't tapped or the screw goes through completely, leaving the end sticking out on the other side. Even in the latter scenario, a nut is not always needed but is usually recommended. Ultimately, it depends on the application. We recommend using nuts where applicable since they can help secure your application better than the screw alone.

What is a screw nut?

A screw nut is a type of mating fastener to bolts. It has a threaded hole, which fastens multiple parts together when used with a bolt or machine screw. These two parts are kept together through friction and compression.

What is a machine screw nut?

Machine screw nuts are finish nuts designed for use with smaller (under 1/4 inch) diameter bolts. They are most often used with machine screws.

What is zinc plated steel?

Zinc plated steel is steel that goes through the process of adding a layer or coating of zinc to protect the steel from corrosion. The added layer of zinc sacrifices itself to keep the steel from rusting, even if the plating is damaged.

Is zinc plated steel rust proof?

No. Zinc plating adds a layer of corrosion resistance for rust protection. Still, it's a thin plating, and it's not as rust resistant as hot-dip galvanizing, which also uses a zinc top layer. While not the most corrosive resistant of materials, zinc plating is easily the most economical and commonly used.