How to Remove a Hex Screw

  • Release date:13-09-2016
  • Abst:

    The six-sided head of a hex screw makes it a […]

    The six-sided head of a hex screw makes it a secure fastener in wood and metal applications. While the screw's head is relatively easy to grasp with pliers, a homeowner risks rounding its corners. Once rounded from misuse, a hex screw is nearly impossible to remove without the proper tools. When searching for the right tools to remove a hex screw, a homeowner should consider the size and type of hex screw, the hex screw's location, and his or her wrist strength.

    A hex socket screw features a hex-shaped recess in the head of the screw. Sometimes called a hex screw, this type of screw requires a hex wrench, also known as an Allen wrench, or a hex screwdriver to remove the screw. Hex socket screws vary in size, so most mechanics, homeowners, and crafters have a full set of Allen wrenches in the toolbox.

    Blunt Impact/Force- This is usually my first step when attempting to loosen stubborn bolts. I ALWAYS use this method before I begin removing exhaust studs from a cylinder head. There are a few methods for this. One is to hit on the head of the bolt in the center with a chisel or punch. Another is use an impact wrench/gun and hit it a few brief times in reverse and forward. Either of these methods work on the theory of freeing the corrosion bond between the threads by vibration or impact. It works sometimes on lightly seized bolts, but isn't a 100% winner every time. But keep in mind it can be combined with many of the other methods to help make the job easier.

    This is one that can be used if the nut or bolt head is so severely stripped you can't turn it with locking jaw pliers, or if the head is broken off the bolt. You can simply take a washer and a bolt of a slightly larger size and tack weld it to the bolt body. Once you have it tack welded, I like to fill the nut with weld and run a bead around the base of where it meets the bolt body. This allows you to put a socket on the bolt again, as well as puts heat into the bolt that will allow it to expand and contract, breaking some of the corrosion. I prefer to use a Mig Welder to do this job as it allows for a little more control than with a stick welder.

    There are many styles/gimmicks. Some work, but many do not. They use hardened bits that grab into the inside of the bolt or nut to remove it. Many you have to drill a small hole in the bolt, then thread these in. Just whatever you do, DO NOT break the extractor off inside the hole, or you are in for a long, horrible process. Normal drill bits will not touch these, so you will need specialty drill bits to drill through them.