ruthex 1/4" Threaded Insert - Pack of 20 RX-1/4" - 20 x 12.7 Brass Threaded Bushings - Sturdy Insert Nut - Can be used in 3D Printing Plastic Parts (Camera Thread) : Amazon.de: DIY & Tools
Maschinengewindebohrer M6 Durchgangsloch (HSS-G, DIN371/76, geschliffen, Form B, mit Schälanschnitt, Metall und Edelstahl tauglich) : Amazon.de: Baumarkt
M2 M3 M4 M5 M6 GB806 High Head 303 Blind Hole Nuts Stainless Steel Advertising for Decorative Nail M6 (Through Hole), Pack of 20 : Amazon.de: DIY & Tools