uxcell M4 Thread Dia Stainless Steel Wingnut Butterfly Wing Nuts 20Pcs Product Name: Wing Nut; Material: Stainless Steel Weight: 38g; Package Content: 20Pcs x Wing Nut Thread Dia: 4mm/0.16" Main Color: Silver Tone Total Size: 19x8x9mm/0.75"x0.3"x0.35"(L*W*H)