Made from 18-8 stainless steel, these metric coupling nuts have good chemical resistance and may be mildly magnetic. Also known as extension nuts, use them to connect and extend threaded rods.

Coupling nuts with a black-oxide finish have a dark surface color.

For technical drawings and 3-D models, click on a part number.

Made from 316 stainless steel, these coupling nuts have excellent resistance to chemicals and salt water. Also known as extension nuts, use them to connect and extend threaded rods. They may be mildly magnetic.

For technical drawings and 3-D models, click on a part number.

Often referred to as extension nuts, use these to connect and extend threaded rods. They're about half the strength of medium-strength steel coupling nuts for use in light duty fastening applications.

Zinc-plated steel coupling nuts resist corrosion in wet environments.

For technical drawings and 3-D models, click on a part number.

Often referred to as extension nuts, use these to connect and extend threaded rods. They're comparable in strength to Class 8.8 bolts.

Zinc-plated steel coupling nuts resist corrosion in wet environments.

Black-oxide steel coupling nuts have a dark surface color and are mildly corrosion resistant in dry environments.

For technical drawings and 3-D models, click on a part number.

With a smooth rounded body for a finished look, use these nuts to connect and extend threaded rods.

18-8 stainless steel coupling nuts have good chemical resistance.

For technical drawings and 3-D models, click on a part number.