Machine Screw Nuts

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.

Hex machine nuts are available in 304 Stainless Steel, 316 Stainless Steel, 18-8 Stainless Steel Black Oxide, Solid Brass, Silicon Bronze, Plain Steel, and Zinc Plated Steel.

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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.

Small Pattern Machine Screw Nuts are available in 18-8 Stainless Steel and Zinc Plated Steel.

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Extra Small Diameter Machine Screw Nuts

Extra Small Pattern Machine Screw Nuts have a much thinner outside diameter (flats) than a standard machine screw nut. For example, a #8-32 Machine Screw Nut has a flats dimension of 11/32 (0.34375) inch, whereas an Extra Small Pattern Machine Screw Nut has a 1/4 (0.250) inch.

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Not sure what material you need? Check out our Material Guide to find the right material for your needs!

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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.

Can Nuts go on screws?

Any screw that has machine threading, like the kind of threading bolts have, can receive a nut. Sheet metal screws, wood screws, and most screws with sharp points are not used with nuts when fastening.

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.