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The SCHLAGE COMMERCIAL L283199 is a replacement pair of spindles and springs designed for L Series mortise locksets installed on doors ranging from 2 inches to 3.5 inches in thickness. This hardware kit maintains the mechanical function of the lever or knob assembly, transmitting rotation from the trim to the latch mechanism inside the mortise case. It is a direct service component for commercial and institutional door hardware and is typically installed or replaced by a licensed locksmith or commercial door hardware technician. The package ships as a single pair (two spindles and two springs), making it suitable for replacing hardware on both sides of the door in one service call.
This part is used in commercial, institutional, and multi-family applications where Schlage L Series mortise hardware is already installed. The L Series is a heavy-duty product line commonly found in high-traffic entryways, office corridors, stairwells, and secured access points. The L283199 accommodates a door thickness range of 2 inches to 3.5 inches, covering the majority of standard hollow metal and solid wood commercial door configurations. It is suited for replacement during routine maintenance or after mechanical wear compromises lever return or latch actuation.
Designed as an OEM-style replacement spindle and spring pair for Schlage Commercial L Series mortise locksets installed on doors with a thickness between 2 inches and 3.5 inches.
Installation and replacement of mortise lockset spindles should be performed by a licensed locksmith or qualified commercial door hardware technician. Before servicing, ensure the door is held open and the lockset trim is fully removed to access the spindle and spring assembly. Verify the replacement spindle length and spring tension are appropriate for the existing mortise case before reassembly. Follow applicable building and life safety codes when servicing hardware on rated fire or egress doors.
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