These M12 stainless steel threaded rods are often used in the lighting sector. They are hollow to allow an electric cable to pass through.
Product description :
Dimensions: M12 - 1mm thread pitch
Inside diameter: 8.0mm
Tube length: from 2 to 5cm depending on variation
Composition: 304 stainless steel
Sold individually
Other dimensions and lengths are available on request for customisation to suit your needs.