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The PRIME LINE PRODUCTS B 512 is a screen door tension spring and nylon roller assembly designed to maintain proper door alignment and smooth operation in sliding screen door systems. Each pack includes two steel tension springs, each fitted with a 1-inch nylon roller. The steel construction provides reliable tension retention, while the nylon roller allows the screen door to glide along its track without binding or excess wear. This hardware is a standard repair and replacement item installed by contractors, handymen, and knowledgeable DIYers working on residential sliding screen doors.
The B 512 is suited for residential sliding screen door applications where the original tension spring and roller assembly has worn, broken, or lost tension. The 1-inch roller size fits common screen door track configurations found on patio and entry screen doors. Each carded 2-pack provides enough hardware to service one door with a spare, or to address two individual roller positions in a single service call.
Designed as an OEM-style replacement for residential sliding screen doors requiring a 1-inch nylon roller tension spring assembly. Verify roller diameter and spring tension requirements against the existing hardware before installation.
Installation is typically performed by a general contractor, handyman, or experienced DIYer. Remove the screen door from its track before servicing the tension spring and roller assembly to prevent the door from shifting during work. Wear safety glasses when handling compressed spring components. Confirm the replacement roller diameter and spring configuration match the original parts before final reinstallation of the door.
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