Nuts ASTM A194 GR.4 (send offer also for GR.7) In the following sizes: M1/2 – 5/8-3/4 – 7/8 -1 “ – 1”1/8 - 1”1/4 - 1 3/8 “ – 1” ½ M12-16-20-24-27-30-33-36 -39-42 20 000 pcs.