Description:Nylon material, single hex head, male female type threaded, and it is perfect for mounting between PCB circuit boards and machine boards.specifications:Product Name: Hex Standoff SpacerThread Size: M3Thread Length: 6mm / 0.24-inchHexagon Length: 40mm / 1.57-inchTotal Length: 46mm / 1.81-inchHex Side Width:5.6mm / 0.22-inchNet Weight: 32gColor: WhiteMaterial: NylonPackage Content: 30pcs x Hex Standoff Spacer