Lock Washer Lock Washer Type Internal Tooth Lock Finish Plain Material Stainless Steel For Screw Size 3/4 in Inside Diameter 0.769 in Outside Diameter 1.22 in Maximum Thickness 0.047 in Color Black Dimensional Standards ASME B18.21.1 Made in North America No Manufacturer Location Globally Sourced Material Grade/Class 410 Material Quality Standards SAE J405 410 Maximum Temperature 500 Degrees F Minimum Temperature -25 Degrees F Pack Size Small Pack REACH Compliant Yes