Sargent 640004 Temporary Interchangeable Core Satin Brass

Product Description

The SARGENT 640004 is a large format interchangeable core (LFIC) designed for temporary construction use. It installs into compatible large format IC cylinders during the construction phase of a project, allowing controlled access before the permanent operating core is installed. The 640004 features an HF keyway and ships without keys. The satin brass finish provides a clean, professional appearance suitable for commercial and institutional applications. Locksmiths, security hardware installers, and commercial door hardware contractors are the typical trades that work with this component.

This temporary construction core is used in commercial, institutional, and multi-family residential projects where large format interchangeable core hardware is specified. It is installed in the cylinder during active construction to allow job-site access while protecting the final keying system. Once construction is complete, the temporary core is removed and replaced with the permanent operating core without disturbing the door hardware itself. The HF keyway designation controls which key blanks and operational cores are compatible within the keying system.

Key Features

• Large format interchangeable core (LFIC) construction configuration
• HF keyway for controlled key blank compatibility
• Satin brass finish for commercial hardware coordination
• Temporary construction core design allows removal and replacement without disturbing the lockset
• No keys included - intended for use with existing job-site key control programs

Compatibility

Designed as an OEM-style temporary construction core for large format interchangeable core cylinders accepting the HF keyway.

Installation Notes

Installation and removal should be performed by a licensed locksmith or qualified security hardware professional. A control key is required to insert and remove interchangeable cores - never attempt to force a core without the proper control key, as this can damage the cylinder housing. Ensure the door hardware is not under load when servicing the core. Follow the applicable building security specifications and access control plans for the project.