Prime Line Products S 4136C 5-pin Tumbler Mailbox Lock

Product Description

The PRIME LINE PRODUCTS S 4136C is a 5-pin tumbler mailbox lock designed as a direct replacement for Dura-Steel lock cylinders. The die-cast cylinder features a nickel-plated face, brass pins, plated steel cams, and spring steel locking clips for durable, reliable performance in residential and commercial mailbox applications. The lock opens with a 90-degree clockwise turn, and the locked position rests with the cam facing down. Each unit ships with one lock and two keys. Locksmiths, maintenance technicians, and property managers typically handle installation of this replacement cylinder.

This lock is suited for mailbox installations in multi-unit residential buildings, apartment complexes, and commercial properties where Dura-Steel cylinders are the existing hardware standard. It is a direct drop-in replacement, making it a practical choice for routine lock servicing, re-keying projects, or damaged cylinder replacement without full hardware replacement. The compact cylinder dimensions allow for straightforward fitment in standard mailbox door cutouts.

Key Features

• 5-pin tumbler mechanism for reliable key operation
• Die-cast cylinder body with nickel-plated face for corrosion resistance
• Brass pins for smooth, consistent actuation
• Plated steel cams with spring steel locking clips for secure retention
• 90-degree clockwise opening direction; locked position is cam-down
• Includes one lock and two keys per unit

Compatibility

Designed as a direct replacement for Dura-Steel mailbox locks. Consult existing hardware dimensions before installation to confirm fitment.

Installation Notes

Installation is typically performed by a locksmith or qualified maintenance technician. Remove the mailbox door panel or access plate before extracting the existing cylinder. Ensure the mailbox is empty and the door is in the open position before beginning work. Do not force the cam into position; confirm the locked-position orientation matches the cam-down specification before securing the retaining clip.