Drill Size For 1/4-20 Form Tap

ISO Standard ThreadTap Drill Size Chart PDF

Drill Size For 1/4-20 Form Tap. This size is recommended for 1/4″. Web straight hole size for 75% thread:

ISO Standard ThreadTap Drill Size Chart PDF
ISO Standard ThreadTap Drill Size Chart PDF

This size is recommended for 1/4″. Web straight hole size for 75% thread:

Web straight hole size for 75% thread: This size is recommended for 1/4″. Web straight hole size for 75% thread: