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SC-Normteile Pack of 25 hexagonal nuts (low shape, with chamfer) (M6) DIN 439 stainless steel A2 (V2A) SC439 : Amazon.de: DIY & Tools
DIN 439 B - Sechskantmuttern, niedrige Form (mit Fase)
Sechskantmutter M12 niedrige Form DIN 439 Edelstahl A2 (1 Stück) - Mutter Flachmutter : Amazon.de: Baumarkt
Amazon.com: Brass Tube Flare Fittings,Union Connector Gas Adapter,BrassTube Coupler 3/4 inch Male Flare to 3/4 inch Male Flare 2 Pack : Industrial & Scientific