Malone Specialty Inc. offers Carbon Steel Male British Parallel Hex Nipples, as well as 316 Stainless Steel Male British Parallel Hex Nipples, in various sizes. This adapter conforms with the ISO 228-1, and the BS 5200 specifications. This item features a 60° cone seat, along with a straight thread, or G thread, on each side. This coupling also offers a centering feature for a bonded seal, or a copper seal.