High-Carbon Steel Fractional Plug TapIdeal for routine maintenance, repair work and for re-threading where high accuracy and tolerance thread is not critical. Straight flutes are ground to provide rapid chip removal for efficient threading. Designed for hand threading work in a variety of materials. Taps produce a class 2B thread. Applicable Materials: Most Metals; Cutting Direction: Right; End Shape: Chamfer - 3 to 5 Threads; Material: High Carbon Steel; Number of Flutes: 4; Style: Plug; Thread Size: 1/4 in; Thread Standard: NC; Threads Per Inch: 20; Weight: 0.02 lb.