Rivet is 1/8 diameter x 1/8 inch long tubular steel used to fasten various playfield components in pinball machines.
Referecnce:
1/8" X 1/8" oval head Semi-Tubular rivet
249-5008-00
Select manufacturer to view game compatibility

Machine Screw 2-56 x 3/8 inch p-ph sems int

Aluminum rivet - 1/8 inch shaft diameter X 3/16 inch long

Rivet - 1/8 x 5/32 inch tubular