Showing posts with label Phillips head screw. Show all posts
Showing posts with label Phillips head screw. Show all posts

Friday, October 13, 2017

The magic of muriatic acid


      I was working on a new coat hook design and working through what screws to include with the hook when I realized that there is no perfect screw that will work for every application.  This is sad. What follows is my attempt to help rectify this for the average person. Or perhaps the person with no fear and time on their hands.  

The coat hooks I'm working on.  These are made from scrap square bar. Slotted screws not hammered.  





Hammered Phillips head screws.  You can see how rough the slots are.



Hammered Phillips head screw. 
   


     I think if you are reading this you probably have a fantastically funky home and amazingly wonderful taste.  It follows that somewhere along the line you bought some forged hardware because ...hey...it's beautiful.  You may have gotten it online from one of the big players (or a small shop like mine) or at a festival or even from the local hardware store, but when you tried to install it you discovered that the screws aka mounting hardware didn't work for your situation.  They might have been the wrong length or the wrong type or maybe there wasn't any mounting hardware.  The supplier of the beautiful forged  hardware was no help, mostly because they are not me, so you went to the local hardware store and got some screws that would work.  Those new screws were perfect except they were bright silver and not the wonderful color of forged iron.  Rather than live with that you either returned the forged hardware in frustration or maybe you painted the screws, or if you are like me, you colored the screws with a Sharpie.  (This is not a paid endorsement.  I'm not opposed to paid endorsements so if you want to pay me to endorse something, drop me a note.)    I admit to using a Sharpie on occasion to fix a color issue on my hardware.  I'm helpful, not perfect.


     There are, however, a couple of other probably better solutions to the bright silver screw or bolt problem.  For this muriatic acid solution the screw has to be zinc plated.  I think it's also called hydrochloric acid.  It can't be stainless steel or nickel plated although you can darken both of those too.  I'll get to that later.  The easiest at home solution to darkening zinc plated screws is muriatic acid.  If you have a pool, you already have some.  If not, it's pretty cheap, comes by the gallon, and can definitely hurt you and possibly kill you if you aren't careful.  Also it's available at all the usual home improvement stores.  The important thing for this application is that it dissolves zinc. 

A really bad picture of zinc plated screws
      In order to get the zinc off the screws they need to be immersed in the muriatic acid.  The guy I learned this from used a piece of steel wire to dip the screws in the bottle of acid.  It only takes a couple of seconds.  I like the acid to remain fresh and I do this a lot so I usually pour a little acid in a plastic cup and drop the screws in.  For the samples in the pictures, I just put a little acid in the lid. 
 
On the left is the plated screw.  On the right is the screw with the plating removed by the acid.
     Once the plating is gone, rinse the acid off the screws and let them dry.  They will probably be a little rusty, but they will be the dull grey color of steel.  After that you can hold the head in the flame of your stove while holding the screw with a pair of pliers until the head turns black.  I would then dip the head in wax.  You can also oil it with kitchen oil.  Like seasoning a cast iron pan.  I had a buddy who seasoned his cast iron pans with Crisco ( Again, not a paid endorsement, for the buddy or Crisco). You can probably use that too.
 
     I think this is a fairly easy way to get a better look for forged hardware.  It doesn't give you a hammered look, but at least it's not bright silver on black.  
 
The plated screw.  The screw with the plating removed.  The screw heated in the stove and waxed.  My dirty hand.

     I'm trying to make hammered screws for my hooks.  I tried to find slotted screws at the big box home improvement stores.  They only have Phillips head.  Phillips head doesn't work that well when I hammer the head so when I have a big enough hardware order, I will add a box of slotted screws to supply with my hooks. I can clean up the slot after hammering much better than I can clean up a Phillips head.  Once I have the screws, I can list the hooks for sale.

    I should mention that there are a couple of caveats with this process.  You do not want to touch muriatic acid.  It's acid.  You also do not want to breath the fumes.  Do this process outside and don't stand over it.  I'm pretty sure breathing the fumes will mess you up.  Once you have removed the plating, the screws will rust. If you want to look at a list of safety tips, click here

    If you need blackened screws or bolts for a bathroom, you could try just holding a stainless steel head in the stove fire. This would also work for nickel plated screws.  Neither of those will rust as readily, but they are also more money.  Natural gas heat on the stove would probably be enough heat to make the head turn black.  It may take a bit longer. I don't know because I have a propane torch, and a forge and an oxy-acetylene rig. (google spell check wants to change this to foxy-acetylene.  What is foxy-acetylene?  Please tell me if you know unless it's going to scare me.)  I don't actually use the stove.  

   The best looking decor is consistent.  You want the mounting hardware to match the rest of the hardware.  This is a little step in that direction. 

    I hope this works for you without pain.  

    Now I need to get back to work.  Until next time

    j

Tuesday, March 8, 2011

The Phillips Head Screw


So a couple of weeks ago I was opening a DVD player for a friend to retrieve a disc that had lodged itself inside.  It was put together with Phillips head screws.  A lot of things are.  Anyway, since I wasn’t anywhere near any of my tools I had to use hers.  When she handed me the two screw drivers she had borrowed for the occasion she said “here’s the flat one and here’s the Phyllis head.” . . . . . . . . .  hmmm.   It was a Phyllis head in name only.  Rats had apparently found it appetizing and gnawed most of the drive end off.  I managed to make it work but the situation made me think about the name and shape of the Phillips head screw and driver so I did a little research.   This is what I found.  

The Phillips head screw was named after its inventor.  I know .  Came as a shock to me too.  Anyway, the part that was surprising to me was that there are entire websites dedicated to the history of screws and screw drivers.    I will list some of them below.

Back to the Phillips head screw.  It was invented by Henry F. Phillips (1890–1958) in 1937.  All of the sites agree on this.  Most agree that it became popular because it was self aligning which was an asset on an assembly line.  Unlike previous screw types, driver placement didn’t need to be exact so it sped up the process of assembly.  This makes sense, but for me it also explains why most Phillips head screw drivers look like rats have eaten them.  If the pressure exerted on the driver when driving isn’t correct it bounces around on the screw and gets chewed up, and then if you go too far it jumps around too.  Eh, there is never a perfect solution for every situation.  Anyway, Cadillac was the first company to use the Phillips head screw and then other automobile manufacturers followed.  While the Phillips head screw took over the world Mr. Phillips did not.  He was apparently stripped of his patent and died in obscurity.  Well, at least as obscure as you can die with your name all over almost every screw made. 
Did I mention he was from Portland, Oregon?  I don’t know why that matters but it’s in every description of his invention.  Must have come as a shock to some.  

Here are some links
.
http://en.wikipedia.org/wiki/Henry_F._Phillips      Wikipedia of course.

http://www.marfas.com/phillips.shtml     A fastener company.  This is pretty thorough.

http://www.phillips-screw.com/history_about_phillips.htm     And not to be outdone, the Phillips screw company.  This has it all.  Way more than the average person wants to know about screws.  

Back to work…