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How to Install a Hasp Lock

Updated November 21, 2016

A hasp lock is designed with two parts, and is commonly used to secure doors or lids. One side of the hasp lock features a mounting plate attached to an elongated latch arm. A slot hole is formed in one end to receive a metal loop. The second part of the hasp is a metal loop attached to a mounting plate. When correctly installed, the latch arm is closed and the loop protrudes through the slot hole. A lock is installed through the loop to secure the hasp lock in place.

Determine a mounting location for installing the hasp lock. Measure up from the ground with a tape measure, making sure the selected height is easily accessible. Mark the mounting height with a pencil.

Place the two parts of the lock hasp together. Insert the loop through the slot hole in the pivoting arm of the lock. Position the hasp lock on the mounting surface so the bottom of the hasp lock rests on the pencil mark.

Level the hasp lock, and open the pivoting arm so the mounting holes are accessible. Mark the hole locations with a pencil, and then close the arm. Position the loop so it does not contact the slot hole as the pivot arm closes.

Open the pivot arm once again, and mark the mounting holes for the loop. Choose a bit that is slightly smaller than the screws you will be using, and insert the bit into a drill.

Drill pilot holes for the screws at each of the mounting points marked with a pencil.

Position the loop mounting plate over the drilled holes, and insert a screw into each hole with a screwdriver. Position the mounting plate for the pivoting arm over the holes drilled for it, and secure in place using screws and a screwdriver.

Close the pivot arm so the loop is accessible through the slot hole, and place a lock through the loop.

Things You'll Need

  • Tape measure
  • Pencil
  • Drill
  • Drill bit
  • Screwdriver
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About the Author

Keith Dooley has a degree in outdoor education and sports management. He has worked as an assistant athletic director, head coach and assistant coach in various sports including football, softball and golf. Dooley has worked for various websites in the past, contributing instructional articles on a wide variety of topics.