PART NO. THREAD DIMENSIONS E F A B L S1 S2 3BM-04-12 G1/4"X19 M12X1.5 5.5 5 25 19 17 3BM-04-14 G1/4"X19 M14X1.5 5.5 5.5 25.5 19 19 3BM-06-12 G3/8"X19 M12X1.5 6.3 5 26.5 22 17 3BM-06-16 G3/8"X19 M16X1.5 6.3 5.5 27.5 22 22 3BM-06-18 G3/8"X19 M18X1.5 6.3 5.5 28.5 22 24 3BM-06-20 G3/8"X19 M20X1.5 6.3 6.5 30 22 27 3BM-08-16 G1/2"X14 M16X1.5 7.5 5.5 29.5 27 22 3BM-08-18 G1/2"X14 M18X1.5 7.5 5.5 30.5 27 24 3BM-08-20 G1/2"X14 M20X1.5 7.5 6.5 32 27 27 3BM-08-22 G1/2"X14 M22X1.5 7.5 6 33 27 27