If you're dealing with vibrations that keep loosening your nuts (the hardware kind, of course!), these Prime-Line nylon insert lock nuts are about to become your new best friends. This pack of 25 #10-32 nuts features a clever nylon ring inside that grips onto bolt threads and seriously resists loosening from vibration - way better than standard nuts. They're made from Grade 18-8 stainless steel, so they're corrosion-resistant and built to last. Here's the important part: you want to install them with the nylon side facing toward the tip of the bolt, not toward whatever you're fastening. They meet ASME B18.6.6 and ASME B1.1 specifications, and they've got UNF-2B fine threads that provide a secure fit. These are perfect for machinery, automotive applications, furniture assembly, or any project where vibration is an issue. One thing to note - they work best when used once, since the holding power decreases if you reuse them. Also, avoid extreme heat or certain chemicals that could damage the nylon insert. They're not just for primary fastening either - you can use them as secondary nuts to lock your main nut in place. Whether you're a professional contractor or a serious DIYer, having these in your toolbox means fewer worries about things coming loose over time. The 25-pack gives you plenty to work with on multiple projects, and the stainless steel construction means they'll hold up well in most environments.
Free 30-day returns 
Free 30-day returns
