Thread Adapter with female 1/4" thread to male 3/8" thread.It works with our Double Head Stud w/ 1/4" to 3/8" thread, and make it work as a Double head stud w/ 3/8" to 3/8" thread.
With female 1/4" thread to male 3/8" thread.
5 packs thread adapters with 1/4" to 3/8" adapter.