Metric Class 10, Din 934, Style 1 Finished Hex Nuts
Amazon.com: HAJXZH Barbells Hex Nut Anti-Slip 2PCS 25mm Barbell Spin-Lock Collar Screw Used for Fitness Equipment Weight Lifting Barbell Or Dumbbell Ba : Sports & Outdoors
2"-4.5 Collar Style Stover Nut Grade C Zinc and Wax | K.L. Jack
100pcs) DIN 6331 M8 Hexagon Collar Nuts, Height 1,5 d A4 Stainless Steel, Ships Free in USA by Aspen Fasteners, ASSP633148: Amazon.com: Industrial & Scientific