STARRETT 25W Roller Contact Point (25W)

Roller Contact Point, Hardened Roller, 3/8" (9.5mm) Diameter, #4-48 Screw Thread. This contact has a small, hardened roller 3/8" (9.5mm) in diameter for continuous gaging of moving material where the material movement is at a slow speed. Contact has #4-48 screw thread and substitutes for the regular contact point provided on Starrett and other AGD indicators. Furnished with a knurled check nut for positioning the contact on the indicator spindle.