BTM KIT Blind Hole Thread Mask Plug Assortment Kit

The Silicone Plugs in This Kit are Perfect for Masking of Blind Threaded Holes and Are Designed to Completely Seal Off The Threads You're needing To Protect. Flange Geometry Is Engineered To Mask Off the Lead-In Chamfer of Threads. A Variety Sizes and Diameters Are Included In This Kit.