Choose from our selection of M18 nuts, including hex nuts, locknuts, and more. Same and Next Day Delivery.

Irregularly shaped threads at the top of these locknuts grip the screw for a stronger hold than nylon-insert locknuts. Although the threads prevent the nut from backing out due to vibration, they also increase the effort to install and remove. To get these nuts off, you may need special tools, such as an impact wrench or propane torch.

Choose from our selection of M18 jam nuts, including medium-strength steel thin hex nuts, high-strength steel thin hex nuts, and more. Same and Next Day Delivery.

These nuts tighten when turned to the left. Use them with left-hand rods and screws to prevent counterclockwise-moving parts from loosening. About half the height of standard-profile nuts, these fit in spaces with low clearance. You can also use them as jam nuts by threading them against another hex nut to hold it in place.

Choose from our selection of M18 cap nuts, including 18-8 stainless steel cap nuts, metric 18-8 stainless steel cap nuts, and more. Same and Next Day Delivery.

For the nut closer to the bearing, position the stepped face towards the bearing. These thin-profile nuts have holes on the side, so you can tighten and loosen them with a pin spanner wrench. All meet DIN 1816, an international standard for bearing locknut dimensions.

Choose from our selection of M18 bolts, including hex head screws, socket head screws, and more. Same and Next Day Delivery.

Choose from our selection of M18 fasteners, including socket head screws, rounded head screws, and more. Same and Next Day Delivery.

A single sleeve (ferrule) bites into tubing as you tighten the nut, creating a strong seal. The nut and sleeve are included. Fittings are also known as flareless fittings. They are brass for good corrosion resistance. For technical drawings and 3-D models, click on a part number.

Choose from our selection of metric jam nuts, including medium-strength steel thin hex nuts, high-strength steel thin hex nuts, and more.