uxcell 5/16 inch-18 Thread Zinc Plated Wingnut Butterfly Wing Nuts 20pcs Thread Size: 5/16"(D); Product Name: Wing Nut Material: Zinc Plated(Carbon Steel); Weight: 131g Package Content: 20pcs x Wing Nut; Main Color: Silver Tone Thread Count: 18 Total Size: 29x13x13mm/1.2"x0.5"x0.5"(L*W*H)