Finished Hex Nuts & Machine Screw Nuts are Two Similar Yet Unique Styles of Nuts!

If you are looking for a nut to match with bolts or machine screws, it's important to note the differences between finished hex nuts and machine screw nuts.

These two styles are similar and can be used interchangeably, but there are some important distinctions to make between them.

Our Finished Hex Nuts start at size 1/4-20 and go up to size 3-4 (that's a 3" size with 4 threads per inch). These are nuts that are made to go with larger screw sizes. They also feature thicker bodies than machine screws nuts, with the bodies being .875 in relation to the diameter of the nut. Additionally, their width across the flats is 1.5 of the nominal diameter of the nut.

We offer finished hex nuts in steel, grade 5, grade 8, grade 9, 18-8 stainless and 316 stainless. Finishes include zinc, black oxide, black zinc, zinc yellow, galvanized as well as several options in an Ecoguard finish.

Metric sizes, ranging from M1.6-0.35 up to M24-3.0, are available in steel classes 6, 8 and 10, as well as 18-8 and 316 stainless. Finishes include zinc and black oxide.

Our Machine Screw Nuts start at size 0-80 and go up to 3/8-24. This is a lower size range than most finished hex nuts, although there is some crossover. They also feature thinner bodies. Body thickness is generally between .621 and .864 of the nominal diameter size. Because they come in such small diameters, some machine screw nuts have a larger width across the flats than finished hex nuts, measuring between 1.67 to 2.60 compared to the diameter size.

Machine screw nuts are available in steel, as well as 18-8 and 316 stainless steel. Finishes include zinc, black oxide, black zinc, zinc green, zinc yellow, as well as some options with a nickel finish. We also offer some small pattern hex and square nut options.

Check out our finished hex nuts and machine screw nuts at the links above!