Fin shank screw used to anchor pop bumper brackets to the playfield. 6-32 x 1-1/4"
Data East / Sega / Stern part number #237-5883-00
Bally/Williams #4506-01103-24
Old Bally #M-1786
Twist shank screws are mostly used on newer machines
Fin shank scews are mostly used on older machines
Both screws will work on any machine