5/16" x 18, national course, self aligning tap & drill set, performance threading system self aligns tap in pre drilled hole especially in irregular surfaces or through holes, carbon steel, ideal for routine maintenance, repair work & for rethreading, straight flutes are ground to provide rapid chip removal for efficient threading, designed for hand-threading work in a variety of materials, includes letter f drill bit
| SKU | 180268 | UPC | 024721997418 |
| Model Number | 1765539 | Brand | Irwin |