Prime Line Products H 3959 Casement Crank Handle 6 Pack

Product Description

The PRIME LINE PRODUCTS H 3959 is a universal folding crank handle designed to fit most casement window operator crank spindles. Built with diecast construction and an aluminum finish, it provides a durable, corrosion-resistant replacement for worn or damaged casement hardware. The folding design collapses flat when not in use, preventing interference with window blinds or interior treatments. This handle ships in a package of 6 units, making it a practical choice for contractors, glaziers, or maintenance professionals servicing multiple windows in a single job.

This handle is suited for residential and light commercial casement window applications where the existing crank handle is broken, missing, or obstructing window coverings. The universal spline system is engineered to engage most standard casement operator spindles without requiring special tooling or adapters. It is commonly installed during window hardware service calls, renovation projects, or multi-unit property maintenance work where standardized replacement parts are preferred.

Key Features

• Universal spline system fits most casement operator crank spindles
• Folding design reduces interference with window blinds and interior treatments
• Diecast construction with aluminum finish for durability and corrosion resistance
• Sold in a package of 6 units for multi-window service efficiency
• Drop-in replacement requiring no special tools or adapters

Compatibility

Designed as a universal replacement for most standard casement window operator crank spindles in residential and light commercial window applications.

Installation Notes

Installation is typically performed by glaziers, window installers, or general maintenance technicians. Before replacing the handle, close the casement window fully and disengage any locking hardware. Remove the existing handle by releasing its retaining fastener, then seat the H 3959 onto the operator spindle and secure per the operator manufacturer's fastening method. Verify the folding mechanism operates freely and does not contact the window frame or sash in the stored position.