diff --git a/screws.scad b/screws.scad
index 6e33a94f..b3c6079a 100644
--- a/screws.scad
+++ b/screws.scad
@@ -2186,6 +2186,7 @@ function _screw_info_english(diam, threadcount, head, thread, drive) =
             ["#5", [   40,    44, undef]],
             ["#6", [   32,    40, undef]],
             ["#8", [   32,    36, undef]],
+            ["#9", [   24,    32, undef]],
             ["#10",[   24,    32, undef]],
             ["#12",[   24,    28,    32]],
             [1/4,  [   20,    28,    32]],
@@ -2450,6 +2451,7 @@ function _screw_info_english(diam, threadcount, head, thread, drive) =
                    ["#5", [  2,     undef, 0.148, 0.074, 0.027,   0.043,   0.122, 0.081, 0.018]], //ph#1 for undercut
                    ["#6", [  2,     10   , 0.168, 0.094, 0.029,   0.048,   0.140, 0.066, 0.025]],
                    ["#8", [  2,     15   , 0.182, 0.110, 0.030,   0.054,   0.168, 0.094, 0.029]],
+                   ["#9", [  2,     20   , 0.190, 0.117, 0.031,   0.057,   0.175, 0.102, 0.030]],
                    ["#10",[  2,     20   , 0.198, 0.124, 0.032,   0.060,   0.182, 0.110, 0.030]],
                    ["#12",[  3,     undef, 0.262, 0.144, 0.035,   0.067,   0.226, 0.110, 0.030]],
                    [1/4,  [  3,     27   , 0.276, 0.160, 0.036,   0.075,   0.244, 0.124, 0.032]],
@@ -2468,6 +2470,7 @@ function _screw_info_english(diam, threadcount, head, thread, drive) =
                    ["#4", [  1,     8    , 0.110, 0.070, 0.018,   0.039]],
                    ["#6", [  2,     10   , 0.148, 0.074, 0.027,   0.048]],
                    ["#8", [  2,     15   , 0.162, 0.090, 0.028,   0.054]],
+                   ["#9", [  2,     20   , 0.170, 0.097, 0.030,   0.057]],
                    ["#10",[  2,     20   , 0.178, 0.104, 0.030,   0.060]],
                    [1/4,  [  3,     27   , 0.240, 0.124, 0.033,   0.075]],
                    [5/16, [  4,     40   , 0.310, 0.157, 0.053,   0.084]],