It features an internal thread size of 1/4"-20 and has a straight wireway.
You will want to get your hands on this ZORO SELECT HS-2520 Head Set if you are looking for a reliable head set to help you install rivet nuts without any hassle. The imperial thread type is compatible with most manufacturers' equipment. This head set can be used for installation of rivet nuts. Head Set, 1/4-20, 1.