Uxcell 3Pcs Machine Thread Taps 8-40 Un 2B High Speed Steel 6542 Straight Flute Product Details Thread Tap Size: Thread size: 8-40 UN; accuracy: 2B; square shank width: 3mm / 0.12"; thread length: 20mm / 0.79"; total length: 56mm / 2.2". Straight Flute Tap: Straight flute tap, clear threads without burrs, right hand tapping direction. Provides rapid downward chip removal to achieve efficient thread cutting, suitable for processing through holes or shallow holes. Wide Applications: Thread taps create new threads or re-thread damaged or jammed threads. Widely used for most metals, iron plate, copper, zinc, alloy steel, abrasive steel, A3 steel, stainless steel. Add proper tapping oil for higher quality threads and more durable taps. 6542 High-Speed Steel Taps: Offer high hardness, good toughness, wear resistance, and excellent cutting performance. Uncoated taps feature just the base substrate without any additional coatings, great for a wide range of applications. Tips: Machine taps are used with tapping, drilling, automatic or milling machines. Drill the holes with a twist drill bit first, then tap with a thread tap. The tapping angle should be 90 degrees vertical and stable. NOT recommended for hand and electric drill tapping. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.