Steel Nut Bonded? To Brass Faucet Stem! - Plumbing - DIY Home Improvement | DIYChatroom
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Old 12-06-2016, 03:42 PM   #1
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steel nut bonded? to brass faucet stem!


I'm stumped unless brute force will work. Please help.

I am trying to remove three 35-year old faucet stems from the counter tops of two vanities. (One faucet came off ok.) Each brass threaded stem is held in place by flat, squarish steel nuts above and below the counter top. Each nut has four notches around the periphery so that one can tighten or loosen the nut by tapping with a flat-blade screwdriver against the inside corner of a notch.

The problem is that the upper rusty steel nut seems to have fused with the brass stem. I am using a "powerful rust penetrating catalyst" by B'laster Corp. in Cleveland that I picked up in a 4 oz. spray can at Home Depot. Three times I have saturated the joint and waited overnight to begin tapping with a hammer and screwdriver. It just won't budge.

Other than pounding the screwdriver with greater force, what else can I do to crack this joint?

I did not think that brass was very reactive, but from looking at the first stem (that I removed without much effort), there are some rusty threads at the top of the stem. The lower nut is not at all rusty. Is it possible for brass and steel to fuse together with a little water around?

Thanks for your expertise.
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Old 12-06-2016, 03:55 PM   #2
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Re: steel nut bonded? to brass faucet stem!


While holding an anvil against one of the squarish sides of the nut, strike the opposite side of the nut with a blunt chisel by striking said blunt chisel with a 16 oz. hammer. Do this on each of the squarish sides and it will distort the nut enough to break the bond.
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Old 12-06-2016, 04:18 PM   #3
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Re: steel nut bonded? to brass faucet stem!


I have had to resort to finding a large enough socket to grab the corners of stuff like that, and using a breaker bar.

Yes with enough hard water deposits, these can fuse together.

ED
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