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What type of concealed overhead door closers is the CRL 1NT304 compatible with?

Windows and Door Hardware
Commercial and Residential Door Hardware
Commercial Patch Fitting Hardware
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DK Hardware 2026-09-30 - 17:56:34
Technical Team

The CRL 1NT304 Top Door Closer Patch Insert connects to CRL, Jackson, International, and many other concealed overhead door closers. It is designed for closers that use a 9/16 inch square spindle.

Product Details

Top Door Closer Patch Insert for Use with Door Closers with 9/16" Square Spindle
1NT304CRL 1NT304 Top Door Closer Patch Insert for Use with Door Closers with 9/16" Square Spindle
(2)
$31.16/Each

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