Features: <br />1. The nut bottom with anti-skid pattern <br />2. They are outer hexagonal nuts<br />Color: Silver <br />Material: Metal <br />Single nut size: about 19.22 x 19.22 x 10mm <br />Nut thread inner diameter: about 8.64 ± 0.05mm <br />Nut outer diameter: about 19.38 ± 0.02mm <br />20 x Flange nuts<br /><img src="http://img6.eachbuyer.com/x9/p100/bt994_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/bt994_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/bt994_3.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/bt994_4.jpg" />