Hollow bolt for 518i all years of manufacturing, only for country version S, you need 2 for 1 car | Wallothesch
Dimensions of Hollo-Bolt Components | Download Scientific Diagram
Buy Wholesale China Hexagonal Hollow Screw Custom Stainless Steel Cylindrical Cup Head Via Screw Hollow Bolt & Hexagonal Hollow Screw at USD 0.066 | Global Sources
Why Use Hollo-Bolts?
Hollo-Bolts - Haydon BoltsHaydon Bolts
Lindapter | Type HB Hollo-Bolt Hexagonal Head | Expansion Bolt
20Pieces M12x20mm Round Head Hollow Screw Bolts Through Hole Bolt Lamp Fasteners | eBay
Lindapter | Type HB Hollo-Bolt Hexagonal Head | Expansion Bolt