The hollow bolts are widely used in lamp lighting, electrical accessories, machinery manufacturing, DIY handmade ornaments, etc., for socket expansion, and fixing ceiling chandeliers or other lamps.SpecificationColor: Silver ToneMaterial: Carbon SteelSurface Treatment: GalvanizingThread Size: M10 x 1mmThread Length: 7mm, 12mm, 17mm, 22mm, 27mmThrough Hole Bolt Size: 10 x 7 mm / 0.39 x 0.28 inch, 15 x 7 mm / 0.59 x 0.28 inch, 20 x 7 mm / 0.79 x 0.28 inch, 25 x 7 mm / 0.98 x 0.28 inch, 30 x 7 mm / 1.18 x 0.28 inch (H*ID)Hex Nut Size: 14 x 3 mm / 0.55 x 0.12 inch (Width*Thickness)Teeth Gasket: 2.5 x 10.5 mm / 0.1 x 0.41 inch (H*ID)Smooth Gasket: 16 x 10 x 0.7 mm / 0.63 x 0.39 x 0.03 inch (OD*ID*Thickness)Packing List: 50pcs x Through Bolt (10 per size), 50pcs x Hex Nut, 50pcs x Teeth Gasket, 50pcs x Smooth GasketAdvantages1. Sturdy carbon steel material, surface plating, anti-corrosion, not easy to rust, easy to clean.2. The center of the bolt is hollow for light wires or wires to pass through.InstructionEasy to use, screw the bolt into the thread and secure it with the nut.NOTE: Please choose the appropriate specification and size according to your needs.
