McMaster-Carr offers a wide selection of plugs for various applications. Their plugs come in different materials like plastic, metal, and rubber and in different styles like tapered, straight, and wing. Common sizes range from 1/8" to 2" in diameter. Most plugs have an IP thread for pipe fittings. McMaster-Carr plugs are made in the USA and are designed for durability, ease of installation, and sealing. Their plugs can be used for patching holes, closing open ends of tubing, or stopping flow.