DIN 660 Round head rivets Yearly volume 80 000 pcs Material SF-Cu Rivet diameter 1,6 mm Rivet lengths: 4 mm or 5 mm. 1. What is the minimum order for testing the 1,6x4 and 1,6x5 mm rivets? I need at least 200 + 200 pcs for trials. 2. What is the lead time for the test patch? 3. Please send me the Yearly volume offer also.