Female 1/2-28 UNEF F To 1/2-20 UNF Male Accessories Threaded Adapter
Female 1/2-20 UNF to Male 1/2-28 UNEF. 1 Piece x Female Thread Adapter. Custom thread adapter, available in two styles Straight through bore: 8 mm (0.315″). Outer thread length: 1/2″. Inner thread depth: 1/2″.