The hollow bolts with polished sides are widely used in lamp lighting, electrical accessories, machinery manufacturing, DIY handmade ornaments, etc., for socket expansion, and fixing ceiling chandeliers or other lamps.

Specification
Color: Silver Tone
Material: Carbon Steel
Surface Treatment: Galvanizing
Thread Size: M12 x 1mm
Through Hole Bolt Size: 20 x 8.5 mm / 0.8 x 0.3 inch (H*ID)
Hex Nut Size: 14 x 3 mm / 0.6 x 0.12 inch (Width*Thickness)
Packing List: 10pcs x Through Bolt, 10pcs x Hex Nut

Advantages
1. 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.

Instruction
Easy 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.