Prime-line B 649 Screen Door Spring Roller Assembly 2 Pack

Product Description

The PRIME-LINE B 649 is a spring roller assembly designed for sliding patio screen doors. It features a center-grooved nylon wheel with a steel housing and a high-tension steel spring that maintains consistent rolling tension along the door track. The assembly keeps the screen door seated and rolling smoothly in the frame channel. Each unit measures 1 inch in outer diameter. This type of hardware is typically installed by glaziers, general contractors, or experienced DIYers performing screen door maintenance or replacement.

The B 649 is suited for residential patio and entry screen door applications where the existing roller has worn, cracked, or lost spring tension. It is specifically noted to fit Columbia Uni-Fit sliding screen door frames. Each package contains 2 roller assemblies, making it practical for replacing both rollers on a single door in one service call.

Key Features

• Center-grooved nylon wheel for smooth, low-friction travel in the door track
• Steel housing provides structural rigidity and resistance to deformation under load
• High-tension steel spring maintains consistent downward pressure on the track
• 1 inch outer diameter wheel fits standard track channel depths
• Sold as a 2-pack to cover a full door replacement in one purchase

Compatibility

Designed to fit Columbia Uni-Fit sliding screen doors. Verify roller outer diameter and housing dimensions against the existing assembly before installation.

Installation Notes

Installation is typically performed by a glazier or general contractor, though the task is within reach of a skilled DIYer with basic hand tools. Remove the screen door from the frame before servicing the rollers by lifting the door up and tilting the bottom outward. Inspect the track for debris or damage before seating the new roller assemblies. Adjust spring tension according to the door manufacturer's slot or screw adjustment on the roller housing to achieve proper door height and smooth operation.