Amazon.com: 20X HEX NUT Cover Cap M4 to M30 Protection Bolt Round Hexagon Dome Black Screw Head CAR Plastic (Diameter M20 / Hex 30mm) : Industrial & Scientific
24mm Lead Screw Diameter (10mm Lead) Flanged Trapezoidal Lead Screw Nuts - Bronze: Accu.co.uk: Precision Lead Screws & Nuts
Écrou hexagonal hexagonal en acier inoxydable 304, boulon à vis M18 M20 M22 - AliExpress
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