When it comes to fasteners, there is one basic starting point: What kind of materials are you looking to fasten together? If the objects are both metal, then you want a fastener with machine threads. That basically means that all of the threads on metallic fasteners will be parallel with the head of the screw or bolt, whatever.
Now the threads on metallic screws or bolts come in two varieties: coarse or fine. Coarse-threaded fasteners will have a wider gap between each thread. And fine-threaded screws, well, have a small or “fine” gap between each thread. So which should you use? Well, it depends on the nature of the objects being fastened together. If a lot of force will be trying to pull the objects apart, then fine threads work better. The more threads the fastener has, the greater the force required to sheer the threads. Otherwise, coarse-threaded fasteners should be fine and they are generally less expensive anyway.
Wood fasteners are those with the winding corkscrew threads. The threads on wood screws begin at the very tip. That way, the fasteners will “bore” into the wood and hold the objects together better. Any fasteners that you see with the winding corkscrew threads are meant to be used with wood. However, there is an exception.
Known as self-tapping fasteners, some metallic screws will have hybrid threads that are a blend of the parallel and corkscrew threads. The corkscrew is not as pronounced on self-tapping screws nor do they extend out as far as those found on wood screws. Also, most self-tapping metallic fasteners are coated in a protective coating that helps them resist corrosion and rust. Self-tapping metallic screws are found all over your automobile and used primarily to hold body panels together. However, they have other applications as well.
So really, a real clue as the use and function of fasteners can be found from their threads. Still, there are hundreds, if not thousands, of different fasteners out there on the market to choose from. By knowing the differences between the threads, however, you should be able to choose a fastener for the job at hand that will work fine for you needs.
More Post
New Medicines Available To Treat Rare Diseases
Music now we learn also on-line
Give A Heart Necklace This Holiday
Cure your Baldness & Alopecia the Natural Way (Chinese Herbs)
Teach Courses Online
Facts About Spirulina- Worlds Most Powerful Food
School Fundraiser Niche - Valentines Day
Hair Loss: Cosmetic Solutions For Good Cover Up
Dating Blindly
Sun Tanning Protects The Skin
Thay Call It "Dog Breath" For A Reason
Using Magnets To Fight The Pain
A Note From Saint Valentine - A First Person Tale Of This Wonderful Day
Spitting Up – And Other Joys Of Motherhood
Las Vegas: How to Ensure Your Vacation is Full of Adventure and Kicks
Is Self-Esteem Contrary to Christianity
What Educational Toys Do Kids Actually Enjoy Playing With?
MLM Success | Relationships in Two Minutes Flat
Are vent free gas fireplaces safe?
Domestic Violence Dr Jekyll or Mr Hyde