Flute Type: Straight. Hand of Cut: Right. Material: HSS. Number of Flutes: 2, Shank Configuration: Straight with Square. Surface Condition: TiN, Tap Blank Construction: USCTI Table 302A, Tap Chamfer: Plug, Tap Construction: Standard, Tap Ground Threads: Yes, Tap Interrupted Thread: No, Tap Limit: H3, Tap Style: Spiral Point Tap, Tap Truncated Threads: No, Tap Type: Machine Tap. Tool Size: 5/16-Inch - 18 UNC. Diameter: 0.3125-Inch. Overall Length: 2.7188-Inch, Overall Length (Metric): 69.06mm, Shank Size: 0.3180-Inch, Shank Size (Metric): 8.08mm, Shank Square Length: 0.3750-Inch, Shank Square Length (Metric): 9.52mm, Shank Square Size: 0.2380-Inch, Shank Square Size (Metric): 6.05mm. Depth of Cut: 2xD. Material Application:- M: Stainless Steel, P: Steel. Operation Type: Thru Hole, Tap Spiral Point: Yes. Thread Creation: Thread Cutting.