20pcs UNC 6#-32*6 Aluminum Knurled Thumb Screws 3.5mm Coarse Teeth For Chassis And Computer Cabinets All ColorName: Knurled Thumb ScrewsMaterial: Aluminum AlloyStandard: UNC/American StandardCategory: Machine ScrewHead type: roundSpecification=tooth diameter*tooth size L (without head)E.g:6#-32*6=UNC6#-32*tooth length 6mmPacking:20pcsApplication: Chassis facet panelNote:1. The precise coloration of the item may be barely different from the picture displayed at the website, which is caused by points such as the brightness of the display.2. Please enable a slight deviation within the dimension data.Hope you may understand, thank you! (I hope you've a reputable shopping~)