Stretch the tape measure to the other side of the inner threads of the nut. Count the lines to find the diameter of the threaded hole. Measure across the widest opening the threads make. This measurement will help you match the thread diameter of the nut with the thread diameter of the bolt.
How do you match a bolt to a nut?
The nut should always be stronger than the bolt, so when using higher strength bolts, such as metric class 10.9, make sure to use the correct, corresponding nut. In this case, a class 10 nut would be correct. Stronger nuts may be used with lower strength bolts without any problems.
How do I know what size nut I need for a bolt?
To measure the diameter of screws and bolts, you measure the distance from the outer thread on one side to the outer thread on the other side. This is called the major diameter and will usually be the proper size of the bolt.
Should nuts be the same grade as the bolt?
Many fasteners (screws, etc.), especially smaller sizes, are typically not graded—their strength isn’t specified. … Special markings on screw heads and nuts identify the fastener’s grade. Replace a graded fastener with same or higher grade (don’t replace a Grade 8 fastener with a Grade 5 or 2).
How do I choose the right bolt?
This is how you choose the right bolt for the joint:
- First, identify the load case.
- Determine the necessary clamping force in the joint.
- Choose the smallest bolt diameter that can support the clamp load.
- Choose an effective bolt securing method.
- Decide on the most appropriate tightening method.
How do I identify a bolt?
Fasteners are identified by four or five attributes; Type, Material, Diameter, Length, and Thread Pitch or Count (machine thread fasteners only).
How do I know if my nut is metric or standard?
How long is that bolt? Most bolts come in pretty uniform lengths; and this is a good way to determine if the bolt is metric or standard. Measure the bolt length (not including the cap), and see if it’s closer to a fraction of an inch, or a nice and round millimeter length that ends in 5 or 0.
How do you read a nut size?
How to Read Screw Sizes
- Read the first letter of the size. This the largest diameter: the measurement of the screw on the thread. …
- Read the second number. …
- Read the third number, generally the one following the “x.”
What does M stand for in bolt sizes?
M = This designates the fastener is a metric size. 10 = The nominal diameter in millimeters. 1.0 = The thread pitch, or distance between threads, in millimeters. 20 = The fastener’s length, in millimeters.
Does a Grade 8 bolt need a grade 8 nut?
Grade 8 bolts have a tensile strength of 150,000 pounds per square inch. We recommend using grade 8 nuts, flat washers and high alloy lock washers with any grade 8 bolts / hex cap screws. The factor that makes a grade 8 bolt different from a lower grade bolt is its preload strength.
Is Grade 8 the strongest bolt?
Commercial-grade 8 bolts are the strongest option available. They’re made from medium carbon alloy steel and have markings that include six raised dashes. The psi of the bolt is 150,000, meaning that it can withstand great deals of pressure because of the way it was quenched and tempered.
What are the 5 things that need to be considered when selecting a replacement bolt?
5 Things You Need To Know When Sourcing Fasteners
- 1) Material. Choosing the right material for fasteners is not only important when considering cost, but even more so when considering factors like strength, brittleness, and corrosion resistance. …
- 2) Coating. …
- 3) Type. …
- 4) Size. …
- 5) Source.
Is a longer bolt stronger?
The longer the bolt length acting within the joint affects it’s stiffeners IE longer = more deflection and obviously shorter = less deflection of the bolt.