Description

The PRIME LINE PRODUCTS 17390-RA is a left-mount casement window crank handle operator designed for older steel-framed casement windows. The operator body is constructed from diecast material and features a 9-inch steel arm paired with a hardened steel worm gear mechanism for smooth, reliable window actuation. The square body profile mounts on the left side of the window frame as viewed from the interior looking outward. Installation hardware and a crank handle are included. This unit is sold in a package quantity of 6.

This operator is intended for replacement or repair service on older steel-framed casement windows. Mounting is achieved via two sets of hole spacings: one pair at 3-7/8 inches on center and a second at 4-3/4 inches on center, accommodating common legacy frame configurations. Window glaziers, general contractors, property maintenance technicians, and experienced DIYers typically handle this type of operator replacement. The included fasteners simplify installation by eliminating the need to source separate hardware.

Key Features

Diecast body construction with a 9-inch steel arm for durable window operation
Hardened steel worm gear mechanism for consistent crank action and long service life
Left-side mount orientation as viewed from the interior looking outward
Dual mounting hole spacing options: 3-7/8 inches and 4-3/4 inches on center
Crank handle and installation fasteners included
Square body profile for compatibility with older steel-framed casement window frames

Compatibility

Designed as an OEM-style replacement operator for older steel-framed casement windows with left-side mount configuration and mounting hole spacings of 3-7/8 inches and 4-3/4 inches on center.

Installation Notes

Installation is typically performed by a window glazier, general contractor, or qualified maintenance technician. Before beginning work, ensure the window sash is fully closed and secured to prevent uncontrolled movement during operator removal and reinstallation. Verify the existing mounting hole pattern matches the 3-7/8-inch or 4-3/4-inch on-center spacing before committing to installation. Use only the included fasteners or manufacturer-specified equivalents to secure the operator to the frame.