Looking for a plug that will mask internal threads AND the first / lead-in thread during powder coating, ecoating, etc.? Check out these first thread plugs.
High Temperature Masking Plugs & Stoppers, Powder Coating - Vital
Masking Plugs - Daemar Inc
White Silicone Sleeve Thread Electroplating Electrophoresis
Signet's Own Natural Rubber Packaging Tape 48mm (Clear)
First Thread Silicone Rubber Masking Plugs
Silicone Rubber Plugs for Powder Coating Masking - Custom
Powder Coating Masking Sealing Rubber Silicone Stopper Thread Hole
20pc Extra Large High Temp Silicone Rubber Plug Kit
High Temp Masking Supply .062 x .187 STP101 Silicone Rubber Plugs
Custom Silicone Rubber First Thread Masking Plugs with Handle
First Thread Silicone Rubber Masking Plugs