Working on a project that vibrates? Don't let your bolts shake loose! These 12# size split lock washers (also called spring washers) are here to help. You get a pack of 120, so you'll have plenty. They're made from 304 stainless steel, which is corrosion-resistant and won't rust, making them great for outdoor or damp conditions. The size is perfect for #12 screws/bolts: inner diameter is 5.6mm (0.22\), outer diameter is 9.3mm (0.37\), and thickness is 0.8mm. You place one under a nut or bolt head; when you tighten down, the split ring compresses and creates spring tension that helps prevent loosening from vibration. Essential for cars, bikes, machinery, furniture, deck building, and tons of DIY applications. A must-have for any toolbox.
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