diff --git a/docs/bom.rst b/docs/bom.rst
index 1328d38..54c89fa 100644
--- a/docs/bom.rst
+++ b/docs/bom.rst
@@ -61,6 +61,9 @@ x   M3 washer
 x   BTR M4 10
 4   BTR M4 50mm *partiellement filete* 
 
+3   Tap joint 15.1 mm inside diameter
+1	Sand paper Sheet 180
+
 ...
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