B 513 - Sliding screen door M style Tension Spring, Steel Ball Bearing Roller, 2 per pkg.

This roller assembly with M shaped tension spring with a 1 inch steel ball bearing roller is used by several patio door manufacturers. The heat treated tension spring is 2-5/16 inches long & shaped like an M giving it the tension needed by the screen door to slide properly.
  • 1 inch steel ball bearing roller
  • 1/4 inch wide roller
  • Concave (Grooved) roller
  • Steel ball bearing roller will roll smoothly
  • Heat treated M shaped tension spring
  • 2-5/16 inch tension spring that is M shaped.
  • Roller assembly is 5/16 inch wide
  • Used by several patio door manufacturers
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