DIN 2573, St 37/ S235, DN 250/273,0 Glatte Flansche Form B (01A), PN 6 : Amazon.de: Baumarkt
300pcs) DIN 6926 M8 Self-Locking Hexagon Flange Nuts with Serration A2 Stainless Steel, Ships Free in USA by Aspen Fasteners, ASSP692628: Amazon.com: Industrial & Scientific