The conventional pipe thread designation is known as what?

The conventional pipe thread designation is known as what?

• A. BSP
• B. PT
• C. G thread
• D. NPT

Answer: (D)

This tests you on the standard name used for pipe threads. The conventional designation most commonly used in the United States is National Pipe Thread. NPT is a tapered threading system, meaning the threads gradually tighten as you screw two parts together, which helps create a seal when paired with thread sealant or tape. This contrasts with other regional standards like British Standard Pipe (which includes tapered BSPT and parallel BSPP “G” threads) or other international variants. Because NPT is the default and most widely recognized standard for piping threads in typical US practice, it is the best answer.

This tests you on the standard name used for pipe threads. The conventional designation most commonly used in the United States is National Pipe Thread. NPT is a tapered threading system, meaning the threads gradually tighten as you screw two parts together, which helps create a seal when paired with thread sealant or tape. This contrasts with other regional standards like British Standard Pipe (which includes tapered BSPT and parallel BSPP “G” threads) or other international variants. Because NPT is the default and most widely recognized standard for piping threads in typical US practice, it is the best answer.