Folger Adam 003-0211-001 Locking Cam Spring — 300 Series Fail-Secure Electric Strike Replacement Part

The Folger Adam 003-0211-001 is a genuine OEM locking cam spring designed for the Folger Adam 300 Series fail-secure electric strike. Referenced as Part #13 in the 300 Series parts diagram, this small but critical component maintains the mechanical integrity of the cam assembly that holds the strike keeper in position. Replacing a worn or broken locking cam spring restores proper latch retention and fail-secure operation — avoiding the cost of a full strike replacement.

What Is a Locking Cam Spring?

In a fail-secure electric strike, the locking cam is the mechanical element that holds the keeper (or latch pocket) closed until an electrical signal releases it. The locking cam spring provides the return tension that re-engages the cam after each release cycle. If this spring weakens, breaks, or loses its set, the strike may fail to re-latch after a release event — compromising both security and positive-latching requirements. Prompt replacement with the correct OEM part restores reliable, code-compliant operation.

Fail-Secure Operation — Why It Matters

The Folger Adam 300 Series is a fail-secure electric strike: in the default (unpowered) state, the keeper is mechanically held closed, maintaining door security during a power outage. Power applied releases the keeper, allowing the door to open. This configuration supports fire-labeled openings because positive latching is preserved at all times — the latch bolt is always engaged in the strike regardless of electrical status. A properly functioning locking cam spring is essential to sustaining this fail-secure behavior.

Applications

• Servicing and restoring Folger Adam 300 Series electric strikes in commercial access control systems
• Preventive maintenance on high-cycle electric strike installations in office buildings, healthcare facilities, educational campuses, and government facilities
• Part-level repair to avoid full strike replacement when only the cam spring has failed
• Facility maintenance programs that stock critical replacement components for fast field repair

Technical Details

Note: DoorwaysPlus can also quote comparable electric strike assemblies and replacement parts from preferred commercial lines such as Sargent, Corbin Russwin, and Hager for facilities evaluating alternative platforms with stable, long-term parts availability.