Lincoln Buttonhead Coupler

Lincoln Buttonhead Coupler

The Lincoln Buttonhead Coupler is a new grease fitting accessory designed for automotive and industrial maintenance. It connects a grease gun to button-head style zerks on heavy equipment and fleet vehicles. Mechanics and technicians who service lubrication points on construction or agricultural machinery will find it matches the task.

Practical limits of button-head interface

The button-head standard uses a broad, flat mating surface that seals against high-pressure grease flow. Couplers of this type can slip if the zerk face is worn, damaged or covered in dried lubricant. Alignment must be kept straight during pumping because the wide contact area offers less self-centering than tapered alternatives.

Replaces worn or lost couplers

This unit replaces a damaged, leaking or missing button-head coupler on an existing grease gun hose or wand. The jump is worth it when the old fitting no longer holds pressure or when the operator needs a fresh seal to prevent grease waste and contamination at the lubrication point.