Drill Size For 1/4-20 Form Tap - Web use this chart from kodiak cutting tools for reference with thread forming tap drill sizes. However, when working with harder materials like steel or stainless steel, a slightly smaller drill bit, such as 7/32″, may be used to create a tighter. Tapping drill size for thread forming. Thread forming taps can be very effective when used properly. This size ensures a snug fit between the tap and the drilled hole, resulting in secure threads. Recently viewed items view all and edit. Web straight hole size for 75% thread:
Web straight hole size for 75% thread: This size ensures a snug fit between the tap and the drilled hole, resulting in secure threads. Recently viewed items view all and edit. Web use this chart from kodiak cutting tools for reference with thread forming tap drill sizes. Tapping drill size for thread forming. Thread forming taps can be very effective when used properly. However, when working with harder materials like steel or stainless steel, a slightly smaller drill bit, such as 7/32″, may be used to create a tighter.