Patent ID: 6982615

Claim:
A method for manufacturing a threaded plunger comprising: creating a bore in the stem of a tuning slug along the longitudinal axis of the stem; rotatably coupling a tuning screw to the tuning slug, wherein the tuning screw comprises a threaded portion and a non-threaded portion, and the non-threaded portion is rotatably coupled to the tuning slug within the bore by a coupling assembly, and wherein the tuning screw is operable to maintain a longitudinal position within the bore when the turning screw is rotated; forming an arcuate groove in the non-threaded portion of the tuning screw, the arcuate groove extending around a surface of the tuning screw; and forming an aperture through a portion of the stem of the tuning slug corresponding to the arcuate groove of the tuning screw when the tuning screw is inserted into the bore.