Secure Solutions for Utility Boxes
At Cobalt Utility Products, we specialize in manufacturing high-quality security lids designed to protect utility boxes at risk of theft and vandalism. Built with durability and reliability in mind, our American-made lids provide robust protection for critical infrastructure, ensuring the safety and integrity of vital systems. With a focus on innovation and excellence, we deliver solutions that give communities and businesses peace of mind, knowing their assets are secure.
Approved for use by Seattle City Light, WSDOT and other municipalities.
100% corrosion resistant materials
Use our standard #001 keyed security bolt, or have your lid fitted with a custom key pattern for your project!

Locking Junction Box Lid | Type 1
Lid measures 17-½” x 12-9/16” x ⅜” thick. Available in galvanized diamond plate or galvanized #3 slipnot finish
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Locking Junction Box Lid | Type 2 |
Lid measures 27-¾” x 16-3/4” x ⅜” thick Available in Galvanized Diamond Plate or Galvanized #3 slipnot finish.
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Aluminum Junction Box | Type 1
Frame Opening Measurements 17-⅝” x 12-11/16” x ⅜” thick Box Overall dimensions 24-½” x 29-¼” x 13”