1/4-27 UNC Solid Balls
1/4-27 UNC Threaded Solid Turned Balls
1/4-27 Balls made of Brass and Steel. Tapped Blind, Tapped Thru and Slip Thru type Thread Configurations. 1/4-27 is a Common Thread on most Lamp Harps. The Thread Measures 1/4in Diameter with a Thread Pitch of 27 Threads Per Inch. For Common Questions about Measuring Lamp Thread click here