Pro-Bolt M25 Stainless Steel Flanged Axle Nut. Titanium Flanged Axle Nut M25 Swing Arm Pivot Drilled Suzuki TL1000R 1998-2002. Stainless Steel Axle Nut M25x(1.50mm) Rear Wheel. Pro-Bolt’s Stainless Steel Flanged Axle Nut is the ideal choice for anyone looking to upgrade their fasteners with a polished, durable, and corrosion-resistant option.