3/8" Blocking Ring (Oil Rubbed Bronze) -by GMS

Premium Blocking Collar by GMS

Enhance your lock installations with the 3/8″ blocking ring, a high‑quality blocking collar solution finished in oil rubbed bronze for both aesthetic appeal and durability. Designed to fit standard mortise cylinders and mortise T‑turn cylinders, this precision‑engineered ring acts as a spacer and stabilizer to ensure proper alignment and secure fit of cylinder hardware during installation and maintenance, helping to maintain door security and performance in both residential and commercial applications. 

Its corrosion‑resistant finish not only preserves appearance over time but also withstands daily use in high‑traffic settings, making it a dependable choice for locksmiths, contractors, and DIY enthusiasts alike. 

FAQs

What is a blocking ring used for?

A blocking ring is a hardware accessory used in lock installations to properly space and support the cylinder within the door. It ensures correct alignment and prevents unwanted movement of the cylinder, improving security and fit.

Can this blocking ring fit all mortise cylinders?

It is made for standard mortise cylinders and mortise thumb-turn cylinders.

All GMS collars fit standard mortise cylinders and mortise t-turn cylinders.