4 Things You
Should Know Before Buying Industrial Fasteners
Before purchasing a fastener there are 4 very important
questions you should ask yourself:
1st Question - What type of material and finish would best fit
my fastener need?
The Material a Fastening System is made of can vary from Low
Carbon Steel to Exotic Alloys. What material a fastener is
“finished with” can also range from plain finish to
performance specific coatings. To determine the right material
and/or finish a person must first understand three vital
areas: the application, performance requirements, and the
environment in which the fastener will be exposed.
- Fasteners can be used in a wide variety of applications:
Machinery, structural building, lumber, flange bolting, etc
- Performance requirements:
- Fasteners are specifically designed to meet certain
performance criteria based on the application.
-ex. Required Minimum Tensile strength: Depending on the
application some fasteners are designed to break before they
bend or vice versa.
-ex. High vs. Low temperature/pressure service.
Last but not least, one should be aware of the environment
the fastening system will be exposed to.
Will the Fastener be exposed to outdoor environment, salt
water atmosphere, perhaps corrosive chemicals?
What type of material will the fastener be used in/on?
(Certain metals can actually cause corrosion when exposed to
The environment plays a large role in determining the finish
(coating) requirements as well.
NOTE: If you are able to put your hands on the a sample of the
fastener in question, look carefully at the item and search
for any distinguishing markings. Most will have a letter,
number or the combination of the two which symbolizes exactly
what material the fastener is made of. This will enable the
fastener experts to give you the correct material that you are
2nd question - What size Fastener do I need?
Sizes of Fasteners range between Standard and Metric Sizes:
-When purchasing a Standard or Metric Fastener you should know
a. Standard Diameter: ¼”, 3/8”, 1” and Metric : 10mm, 20mm
1. Threads per Inch (Standard): measured as the number of
threads in a one inch area: (NOTE: always skip the 1st thread
when counting the number of threads)
ex. (Coarse or fine): ¼”-20tpi or ¼”-28tpi
b2. Thread Pitch (Metric): measured by the distance between
the pitch (or top of each thread) in Millimeters: ex. (Coarse
or Fine) : M10-1.5 or M10.125
c. Length of Fastener:
-Does the length allow for a Nut and/or Flat Washer?
- If stud bolts, do I want my stud measured Over All Length (OAL)
or First to First thread (FTF)?
d. Length of Thread:
- Does my application require standard thread (which is twice
the diameter plus ¼ and if length is over 6” it would be twice
the diameter + ½) or do I need material fully threaded?
3rd question - What type of Fastener do I need?
There are many different types of fasteners designed for
specific purposes and applications.
Some common types are:
Hex head cap screw (most common, usually referred to as a
bolt but there is a distinct difference)
Heavy Hex Bolt
All thread stud
Socket drive screws (socket head cap screw, socket set
One should also consider what type of drive they want on their
fastener: hex head, socket, Phillips, slotted, security, etc
Finally, the most important question: Am I
purchasing my Fastener System from a company who lists “The 4
things you need to know before buying fasteners?”
Purchasing fasteners has the potential to be a time consuming
and exhausting task. Imagine this task becoming as simple as a
phone call doing business with a company whose knowledge and
experience will save you time and money!
If you take these 4 steps into account before beginning your
fastener search, you should find the task a quick and easy
Product Line to view a list of
fasteners and other items that we carry. To read
comments from existing clients about the quality of our
products and customer service, please visit the
testimonials page. To
learn more about our products, or to place your order, please call (225) 272-1703
today, or complete our easy quick