Machine Screw Nuts in Plain 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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Plain steel machine screw nuts are low carbon steel nuts with no finish, coating, or plating. Having a plain "finish" means these nut are very vulnerable to corrosion. Plain fasteners are best used in non-corrosive, indoor environments and are the most economical choice for such applications. After all, if the fasteners aren't going to be exposed to corrosion, why spend extra on a plating or coating?

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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 plain steel?

The term "plain steel" usually refers to carbon steel or mild steel with no plating or coating.

What kind of steel is plain steel?

Plain steel usually refers to carbon steel because of the amount of carbon in it. For example, low carbon steel contains a maximum of 3% carbon in it. This affects the steel alloy properties and can affect the exact grade of steel the alloy gets. The plain steel we have in this selection is low carbon steel.