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The PRIME-LINE PRODUCTS H 3517 is a left-hand casement window operator designed for residential and light commercial window hardware applications. Built with die-cast construction, this operator features a 9-inch steel arm and a square body with a 3/8-inch spindle. The bronze finish provides corrosion resistance suited to typical interior and exterior window environments. All mounting hardware is included in the package. Window glaziers, general contractors, and experienced DIYers install this type of hardware as part of routine casement window maintenance or replacement service.
This operator fits left-hand casement window configurations where the hinge is on the left side when viewed from inside the building. It is commonly used in residential replacement scenarios where the original operator has worn, stripped, or broken. The 9-inch steel arm provides the mechanical leverage needed to open and close the sash smoothly. The included mounting hardware simplifies installation without requiring additional fastener sourcing.
Designed as an OEM-style replacement for left-hand casement window operators using a square-body housing with a 3/8-inch spindle in residential and light commercial window applications.
Window hardware replacement is typically performed by glaziers, general contractors, or qualified DIYers. Before beginning installation, fully close the window sash and ensure no load is on the existing operator arm. Remove the old operator by detaching the arm from the sash shoe and unscrewing the operator body from the frame. Confirm the hand orientation — left vs. right — before fastening the new operator in place.
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