There are four simple steps to try initially:
1) Clean up the seized fastener... use a combination of degreasers, detergents, abrasives and wire brushes. This sets things up for the next step...
2) Search for the term "penetrating lubricant". These are specially formulated to squeeze into the small spaces in fastener threads. Use the lubricant liberally. Use wire brushes to work it in, further cleansing the area.
3) Try to rock the fastener in both directions... particularly effective if it starts to come undone then jams. Add more lube as you go... it should rock a little further each time until it frees up. if not...
4) If seized absolutely solid try a freeze and release spray... very effective and much safer than heat around delicate electrics, heater hoses, brake lines etc.
If they are beyond repair, I cut them off with a thin metal cutting disc in an angle grinder.
Open the bolt and rack it back. Hold back the trigger. The bolt should slide easily backwards until it detaches from the rifle. If you have a rear sight that blocks the bolt from being removed, simply rotate the bolt handle clock-wise to get it passed the sight and remove as usual.
Undo the bolt
he diameter of the bolt.
1/2"x2" m.s bolt
you use a spanner to open a rusted nut bolt because you need a strong tool to open a rusted nut bolt.
Bad news. I have found it impossible to remove the bolt caps without breaking them. They are mortared on. They do make plastic bolt caps in a lot of different colors.
Your going to need to get a special puller if its rusted on, usually if its new or not rusty you can just remove the bolt and hit it with a hammer a few times and it will come right off but if it is rusted then you should get a crankshaft dampner puller
Left intact the rusted bolt because it has the added mass of the Oxygen. Once cleaned up it will be lighter because it has lost mass in the form of iron atoms in the Iron Oxide molecules.
Remove the caliper and pad bracketas. Then remove the 5mm Allen bolt holding the rotor on.....If the rotor is rusted you may have to beat it off with a hammer
a good way to remove a metal bolt is to get a screw extractor. You drill a small pilot hole down the middle of the bolt, and lightly tap the extractor into the hole. The bolt will then twist out. You may need to add lube to the bolt if its rusted (WD-40 etc.)
Rusting bolts normally indicates that the bolts are brittle. Taking a pair of water pump pliers and squeezing really hard will most of the time break the rusted bolt so you can remove the toilet seat. Otherwise depending on the type of toilet seat installed, you can drill a hole right through exactly where the rusted bolts slot in, so helping you remove the toilet seat.
P(A) chance of being a bolt = 50/200=1/4 P(B) i.e chance of a rusted item ( i.e bolt or nuts) =100/200=1/2 P(AB) = P ( OF BEING RUSTED AND BOLT)= 25/200= 1/8 P(A or B) = the probability that it is rusted or a bolt. = P(A) + P(B) -P(AB)=0.25+0.5-0.125=0.625 51/200
Just use a bolt cutter. You'll have them off in 2 minutes.
Soak it with penetrating oil and let it sit for a few hours then use an impact wrench or breaker bar to remove it.
Most of the time it breaks off and you will need to drill it out and replace screew.
Torches & burn them off