Key Locking Insert: Extra Heavy Wall, 4 Keys, 9/16"-18 Int Thrd Sz, 7/8"-14 Ext Thrd Sz, 10 PK [PK/10] Model: 217-077539

Key Locking Insert: Heavy Wall, 4 Keys, 1/4"-20 Int Thrd Sz, 7/16"-14 Ext Thrd Sz, Plain, 10 PK [PK/10] Model: 217-077302

Key Locking Insert: Heavy Wall, 4 Keys, 5/16"-18 Int Thrd Sz, 1/2"-13 Ext Thrd Sz, Plain, 10 PK [PK/10] Model: 215-066303

Key Locking Thread Insert, Heavy Wall, 4 Keys, 3/8"-16 Int Thrd Sz, 9/16"-12 Ext Thrd Sz, 10 PK

Key Locking Thread Insert, Thin Wall, 4 Keys, 3/8"-16 Int Thrd Sz, 1/2"-13 Ext Thrd Sz, 10 PK