Union nuts DIN 3870 For pipe fittings ISO 8434-1 Material: steel M12x1,5 M14x1,5 M16x1,5 M20x1,5 M22x1,5 M24x1,5 M30x1,5 Quantities from 16.000 pcs. to 550.000 pcs. Please contact directly the customer for the exact quantity of each dimension.