How to Remove Seized Flat Head Nuts and Bolts

When it comes to seized flat head nuts,bolts,as well as screws,most home mechanics quickly become frustrated and start forcing the issue before they've really thought about the implications of the problem.That usually makes the problem worse,which naturally leads to a loss of temper,which generally destroys the fastener - be it a flat head nut,screw or whatever - which in turn ruins the job.

The first thing to do before removing any flat head nut is to make sure you've got the correct tool

Sounds simple enough,but many home mechanics get it wrong time and time again.So don't even think about using,say,a Whitworth spanner on a flat head nut,or vice versa.Don't use any spanner on any flat head nut or bolt that wasn't designed for it.Even though the spanner fits as well as works,it might well damage the fastener,thereby giving you problems the next time around.

Given that you've now got the right tool,use gentle pressure to see if the fastener is going to give you problems.Typical warning signs of impending problems are flat head nuts,or damaged screw heads or corrosion.Also,flat head nut and bolts that have been subject to heavy torsional forces often cause major problems.Flat head nuts and bolts and screws that have been subjected to repeated heating and cooling are also likely to give you trouble and are prone to shearing.Remember too that a bolt that suddenly shears might lead to other damage on the bike. Or on yourself.