Prime-Line #4-40 Nylon Hex Nuts Machine Screw (25-Pack)

Hex nuts are the most widely used nuts and will work for most applications. They are standard thickness and can be installed with a wrench or socket set. Machine screw nuts, is a subset of finished hex nuts designed for use with machine screws, which are typically much smaller than bolts.

• Installs easily with most wrenches
• Designed to be used with the same sized screw
• Stainless steel construction offers rust-resistant performance