M3-0.5 (100 pcs) K-Lock Nuts with External Tooth Lock Washer, 304 Stainless Steel 18-8

Nut thread size: 3mm; Thread Pitch: 0.5mm | Hex Drive Size: 5.5mm; Package: 100 pcs | Nut width (including the teeth): 7.3mm (max); Nut Height: 3.4mm (max)----- Nut width and height include the washer. | Material: High Quality 304 Stainless Steel 18-8, great strength and good corrosion resistance to make fasteners last! | K-Lock Nuts, also know as kep nut, feature a conical external tooth washer attached to the bottom of the nut. The free-spinning tooth lock washer grips the material surface instead of threads for easy installation and mild vibration resistance.