3"-8 NPS Straight Pipe Tap, High Speed Steel

Model #: NPS-3

Price: $527.60

Description: 3"-8 NPS HS Straight Pipe Tap 0343-0055

• Size-Thread: 3 - 8
• Straight Pipe Tap - NOT tapered.
• High Speed Steel. Ground Threads.
• Approximate Thread Diameter: 3.5"

Often used in light fixtures and lamps.
The "pipe size" listed (such as 1/2"-14) gives the inside diameter of the pipe this tool is intended to thread a hole to accept the outside of, followed by the threads per inch the tap will cut.