• REGAL: The manufacturer brand, known for producing high-quality American-made industrial cutting and threading tools.

• 2"-8 NS: The nominal size of the tap. It cuts a 2-inch diameter thread with a pitch of 8 threads per inch (TPI). "NS" stands for National Special, indicating a specialized thread series rather than the standard coarse (UNC) or fine (UNF) series.

HSG H-6: "HSG" denotes that it is a ground-thread tool made from High-Speed Steel (HSS). "H-6" designates the specific H-limit, which controls the pitch diameter tolerance zone to produce the desired class of thread

• Shank Diameter: 1.500 inches (1-1/2")

Square Drive Size: 1.125 inches (1-1/8")

(OAL) is 7-5/8 inches (7.625 inches or 193.68 mm).