PART NO. THREAD DIMENSIONS E F A B L S2 S3 3M-12 M12X1.5 M12X1.5 5 5 25 17 17 3M-14 M14X1.5 M14X1.5 5.5 5.5 26 19 19 3M-16 M16X1.5 M16X1.5 5.5 5.5 27.5 22 22 3M-18 M18X1.5 M18X1.5 5.5 5.5 29 24 24 3M-18-20 M18X1.5 M20X1.5 5.5 6.5 30.5 24 27 3M-18-22 M18X1.5 M22X1.5 5.5 6 32 24 27 3M-20 M20X1.5 M20X1.5 6.5 6.5 33 27 27 3M-20-22 M20X1.5 M22X1.5 6.5 6 33.5 27 27 3M-22 M22X1.5 M22X1.5 6 6 34 27 27