Lock Washer, Lock Washer Type Wedge Lock, Finish Plain, Material Stainless Steel, For Screw Size 3/8 in, Inside Diameter 0.409 in, Outside Diameter 0.705 in, Maximum Thickness 0.135 in, Assembly Thickness 0.135 in, Color Silver, Material Grade/Class Not Graded, Pack Size Small Pack, Resistance Properties Shock , Vibration , Rockwell Hardness HRC25, System of Measurement Inch, Package Quantity 200