Stainless Steel 304 Hexagon Head Hollow| Alibaba.com
Wholesale bolt with hole in middle Made For Various Purposes On Sale - Alibaba.com
Stainless Steel Hollow Hole Through Air-out Pass Allen Hexagon Hex Socket Cap Head Screw Bolt (Color : 10mm, Size : M5(10PCS)) : Amazon.co.uk: DIY & Tools
25pcs) DIN 6912 M20X130 Socket Head Cap Screws with Center Hole, Low Head A4 Stainless Steel, Ships Free in USA by Aspen Fasteners, ASSP6912420-130: Amazon.com: Industrial & Scientific
Hex Head Screws with Hole from MISUMI | MISUMI
Machining Hex Bolts with Holes in Head and Thread - China High Tensile Bolts, Hex Flange Bolts | Made-in-China.com
Hex Head Hollow Through Hole Screws Bolt M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 | eBay