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
- Concave (Grooved)
- Steel ball bearing roller will roll smoothly
- Heat treated M shaped tension
- 2-5/16 inch tension spring that is M shaped.
- Roller assembly is 5/16 inch wide
- Used by several patio door manufacturers