4pcs M6 M8 Allen Screw Hex Head Cup Thread Fine/coarse Bolts Full Tooth Screws Carbon Steel Mechanical Bolt 12.9 Grade - Bolts - AliExpress
Amazon.com: Bolt Base 8 mm Acero Inoxidable A2 de cabeza avellanada Csk cabeza hexagonal Socket Tornillo Allen tornillos M8 x 40 : Industrial y Científico
Amazon.com: Socket Flat Countersunk Head Cap Screw, DIN 7991, M8-1.25 x 25mm, Stainless Steel A2-70, Hex Socket (Quantity: 100) Coarse Thread, M8 Hexagonal Allen Bolt, Length: 25mm, Full Thread : Industrial & Scientific
Brass Socket Cup Point Grub Screws Hex Allen Set Screws M2 M2.5 M3 M4 M5 M6~M12 | eBay