uxcell M10 Thread Dia Dome Head Stainless Steel Cap Acorn Hex Nuts 20pcs Thread Size: M10/0.4"(Female.Diameter); Product Name: Cap Nuts Material: Stainless Steel (8 Grade); Weight: 378g Package Content: 20pcs x Cap Nuts; Main Color: Silver Tone Dome Head Size: 16x10mm/0.63"x0.4"(Max.D*Height); Total Height: 18mm/0.7" Hex Width: 17mm/0.67"; Fastener Type: Cap Acorn Nut