Eagle "OK" Glass Plug Fuses Value Guide

These Eagle 'OK' brand glass plug fuses represent a pivotal era in American residential electrical safety before the dominance of modern circuit breakers. Highly collectible for their industrial aesthetic, these 15-ampere fuses feature the iconic screw-in design used to protect household circuits from overloads during the mid-20th century.

What Is Eagle "OK" Glass Plug Fuses Worth?

The typical price range for Eagle "OK" Glass Plug Fuses is $10 - $20 based on recent sales. However, values can vary depending on the item's condition, rarity, and other factors such as:

• Condition of the glass and brass; oxidation on the metal or cracks in the glass can decrease value.
• Functionality of the fuse, as intact internal wires are more desirable for collectors than 'blown' examples.
• Completeness of the set, especially if they remain in their original 1930s-1950s era cardboard packaging.
• Clarity of the 'OK' logo and Eagle brand markings on the ceramic and glass components.

How to Identify Eagle "OK" Glass Plug Fuses?

• Look for the distinct 'OK' branding printed clearly on the center of the glass face.
• Verify the 15-ampere rating which is typically stamped into the brass base or printed on the interior paper.
• Check for the authentic material composition consisting of a glass top, ceramic body, and brass screw threading.
• Ensure the internal conductive wire is visible through the glass, indicating whether the fuse is intact or blown.

History of Eagle "OK" Glass Plug Fuses

Before the widespread adoption of circuit breakers, plug fuses like these were essential for protecting household electrical circuits from overloads. The 'OK' brand, under companies like Eagle, produced these common screw-in fuses, allowing homeowners to easily replace a blown fuse to restore power. These specific fuses are rated for 15 amperes, indicating their intended use in circuits with lower power demands.