Flute Type: Straight. Hand of Cut: Left. Material: HSS. Number of Flutes: 4, Shank Configuration: Straight with Square. Surface Condition: Bright, Tap Blank Construction: USCTI Table 302, Tap Chamfer: Taper-Plug-Bottoming, Tap Construction: Left-Hand, Tap Ground Threads: Yes, Tap Interrupted Thread: No, Tap Limit: H3, Tap Spiral Point: No, Tap Style: Straight Flute Hand Tap, Tap Truncated Threads: No, Tap Type: Hand Tap. Tool Size: 1/4 - 28 UNF, Set Case Brand: Rose Plastic, Set Case Type: UniBox, Set Number of Pieces: 3, Set Size Range: 1/4 - 28 UNF. Diameter: 0.2500-Inch. Overall Length: 2.5000-Inch, Overall Length (Metric): 63.50mm, Shank Size: 0.2550-Inch, Shank Size (Metric): 6.48mm, Shank Square Length: 0.3125-Inch, Shank Square Length (Metric): 7.94mm, Shank Square Size: 0.1910-Inch, Shank Square Size (Metric): 4.85mm, Tap Neck Length: 0.3900-Inch. Depth of Cut: 2xD. Material Application:- K: Cast Iron, M: Stainless Steel, N: Non-ferrous Metal, P: Steel. Operation Type: Blind Hole.