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: M4Thread Length: 6mm / 0.24-inchHexagon Length: 30mm / 1.18-inchTotal Length: 36mm / 1.41-inchHex Side Width:7mm / 0.28-inchNet Weight: 56gColor: BlackMaterial: NylonPackage Content: 50+/-2%pcs x Hex Standoff Spacer