diff --git a/readme.md b/readme.md
index c2588e8..8c16054 100644
--- a/readme.md
+++ b/readme.md
@@ -2070,6 +2070,7 @@ If a nut is given a child then it gets placed on its top surface.
 | `nut_and_washer(type, nyloc)` | Draw nut with corresponding washer |
 | `nut_square(type, brass = false, nylon = false)` | Draw specified square nut |
 | `nut_trap(screw, nut, depth = 0, horizontal = false, supported = false, h = 200)` | Make a nut trap |
+| `sliding_t_nut(type)` | Draw a sliding T nut, T nut with a spring loaded ball or a hammer nut. |
 | `wingnut(type)` | Draw a wingnut |
 
 ![nuts](tests/png/nuts.png)
diff --git a/vitamins/nut.scad b/vitamins/nut.scad
index 198cad0..8dda5ee 100644
--- a/vitamins/nut.scad
+++ b/vitamins/nut.scad
@@ -177,7 +177,7 @@ module sliding_ball_t_nut(size, w, h, r) {
         }
 }
 
-module sliding_t_nut(type) {
+module sliding_t_nut(type) { //! Draw a sliding T nut, T nut with a spring loaded ball or a hammer nut.
     hammerNut = type[10];
     size = [type[7], nut_square_width(type), nut_thickness(type, true)];
     tab = t_nut_tab(type);