| 摘要 |
A self-tapping and/or self-carving stud having two or more right angle elongate grooves of alternate length in the tapered thread or projecting helical ribs. The right angled grooves enable tapping debris to accumulate in the grooves to help lock the threads for fastening the stud, particularly in irregular holes. The alternate length of the grooves helps make this stud design unbreakable, thus unbeatable for special situations especially in exhaust manifold applications. |
