Mills Iron Works is a premier supplier of butt weld reducers, bull plugs, caps and swage nipples. They have played an important part as a supplier and a customer in the LA basin with a history stretching over 100 years. Their products are recognized and provided across the USA. Their current core products are carbon steel caps, swaged nipples, bull plugs and welding reducers. Material provided in black finish or electro-galvanized.