NUTS DIN 934 Material: AISI 321 M10 2000 pcs. NUTS DIN 934 Material: AISI 321 M12 2500 pcs. NUTS ASTM Material: A194 Gr.4 M16 2000 pcs. NUTS ASTM Material: A194 Gr.4 M20 4000 pcs. Please include 3.1 certificates and indicate delivery time