Alfa Tools 1/4-20 NC SOLID THREAD INSERT EXTRA HEAVY DUTY

Solid Screw Insert, 1/4"-20 National Coarse Internal Thread, Extra Heavy Wall, 1/2"-13 External Thread, 0.484 Length, 27/64" Tap Drill Size, 1/2"-13 Tap Size, 9/16" Minimum Full Thread Depth, 10 per Pack