outdoor bolts that dont rust or seize up?

  • Advertise with us

« back to Coffee Lounge forum

Forum topic by WoodNSawdust posted 11-26-2015 05:08 PM 679 views 0 times favorited 2 replies Add to Favorites Watch
View WoodNSawdust's profile


1417 posts in 1689 days

11-26-2015 05:08 PM

Topic tags/keywords: bolts bolts seizing up rust question

Many years ago I bought a cast iron Chimenea from ACE hardware. Every few years I have to replace the vertical chimney due to the sheet metal rusting. The chimney is attached to the cast iron top using 10-32 bolts a half inch long. They screw through holes in the vertical pipe into threaded holes in the cast iron. Unfortunately, being exposed to the weather causes the bolts to rust and seize up in the cast iron.

As you may have guessed, it is time to remove and replace the chimney. I just broke the old chimney away but the bolts will not come out. I have tried WD-40, tapping the screwdriver while turning, and heat.

My question is once I get the bolts out what should I buy to avoid this problem in the future? Maybe Stainless Steal?

-- "I love it when a plan comes together" John "Hannibal" Smith

2 replies so far

View Bluepine38's profile


3387 posts in 3598 days

#1 posted 11-26-2015 06:06 PM

With the little I know about cast iron, it might be easier to drill the bolts out and tap the holes for 1/4-20
bolts. Stainless would be the easiest solution I can think off, you could put some anti seize on the bolts
to help. Automotive stores have small tubes of it, I use it when putting spark plugs in both aluminum and
iron heads, and they come out easily.

-- As ever, Gus-the 80 yr young apprentice carpenter

View WoodNSawdust's profile


1417 posts in 1689 days

#2 posted 11-26-2015 06:38 PM

Bluepine38, thank you for your reply. There is not enough of a lip for me to use 1/4 inch bolts. I can drill and tap replacement #10 bolt holes, but in a couple of years the hvac duct will be rusted again and I will have the same problem. I have not thought of automotive anti seize. I will look into it.

-- "I love it when a plan comes together" John "Hannibal" Smith

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics