SPECIFICATION FOR STUD BOLTS AND TAP END STUDSSTUD BOLT WITH NUTS POINT HEIGHT L API TYPE 6B FLANGE L S Figure 1 L API TYPE 6BX FLANGE NO STANDOFF AWHEM Recommendation For Stud Bolts and Tap End Studs For API Spec 6A 4 METHOD OF CALCULATING STUD BOLT LENGTHS FOR TYPE 6B AND 6BX FLANGES CALCULATION The following formula was used in establishing stud bolt lengths listed in