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Amazon.com: A2 Edelstahl Sockel Senkkopfschraube Innensechskant Schrauben M4 4 mm x 35 mm (25 Stück) : Electronics
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Pack of 50 Lens Head Screws with Flange M4 x 20 mm - ISO 7380/2 - A2 Stainless Steel - Hex Socket - V2A - Lens Flange Head Screws (50, M4 x 20 mm) : Amazon.de: DIY & Tools
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