DIN6917 spuare taper washers for friction grip bolts on T-sections楔型方垫圈 (I型) For Thread size M12 M16 M20 M22 M24 M27 M30 M36 d 13 17 21 23 25 28 31 37 a 26 32 40 44 56 56 62 68 b 30 36 44 50 56 56 62 68 h 6.2 7.5 9.2 10 10.8 10.8 11.7 12.5
