1/4-20 UNC Solid Balls
1/4-20 UNC Threaded Solid Turned Balls
1/4-20 Balls made of Brass and Steel. Tapped Blind, Tapped Through and Slip-Through type thread configurations.1/4-20 UNC thread measures 1/4in fiameter with a thread pitch of 20 threads per inch. For Common Questions about Measuring Lamp Thread click here.