Size: Thread Size: M8x0., 75; Thread Length: 8mm / 0., 31; Thread Inner Diameter: 4mm / 0., 16; Nut Length: 8., 5mm / 0., 33; Nut Width: 12mm / 0., 47; Total Dimension: 11x12mm / 0., 43x0., 47(H*OD). The nuts is made of steel, durable, corrosion resistant and long service life. With the small size, it is convenient for you to bring for the bicycle. It is a good replacement for the old or broken one. Match for the double wheel chain wheel. The crank cap can be used to fix the crank of the chain, a good accessory for riding. The item is a universal product, please measure the size before... Speedline Parts | Titanium Chainring Bolts Easy Installation: With the small size, it is convenient for bicycle installation. The item is a universal product, please measure the size before ordering. Durable Material: The chainring nut is made of steel, durable, corrosion resistant and long service life. Match for the chain repairing. Road Mountain Bike Chainring Hardware 5Pcs Bicycle Bike Chainring Screw Chainwheel Bolt For Single Double Triple Speedgold 5mm Steel Bicycle Crank Bolts Package Include:5 x Bike Chainring Nuts X AUTOHAUX 5pcs Silver Tone 8.5mm Chainring Nuts Steel Bicycle Chain Ring Bolts Nuts Double Chain Wheel for Road Bike Mountain Bike : : Sports, Fitness & Outdoors Size: Thread Size: M8x0.75; Thread Length: 8mm / 0.31; Thread Inner Diameter: 4mm / 0.16; Nut Length: 8.5mm / 0.33; Nut Width: 12mm / 0.47; Total Dimension: 11x12mm / .43x0.47 (H*OD). Good Replacement Match for the double wheel chain wheel. The crank cap can be used to fix the crank of the chain, a good accessory for riding.