Kuryakyn 2288 Silver Mini Bullet Mounting Stud These come in handy for fender strut applications. Adapter studs are hollow and threaded 3/8"-16 on one end and 5/16"-24 the other for mounting Silver Bullets or Mini Bullet Lights with 3/8" threaded mounting holes in a 5/16" hole. The 5/16" diameter end should be cut to length to ensure adequate clearance. Sold as a pair. Kuryakyn part number: 2288.