300pcs) DIN 6926 M8 Self-Locking Hexagon Flange Nuts with Serration A2 Stainless Steel, Ships Free in USA by Aspen Fasteners, ASSP692628: Amazon.com: Industrial & Scientific
John Deere 8mm Hex Flange Prevailing Torque Lock Nut OEM 100 Series Lawn Tractor: Luer Nuts: Amazon.com: Industrial & Scientific