Before revision: Tapered threads The threaded pipes used in some plumbing installations for the delivery of gases or liquids under pressure have a threaded section that is slightly conical (in contrast to the parallel sided cylindrical section commonly found on bolts and leadscrews).
After revision: Tapered threads The threaded pipes used in some plumbing installations for the delivery of gases or liquids under pressure have a tapered thread that is slightly conical (in contrast to the parallel sided cylindrical section commonly found on bolts and leadscrews).