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A grade denotes the mechanical properties of a screw - the materials used, size, direction of the thread and so on.
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What is a girder fastener?
The answer is rivet.
What is Threaded Flange?
A flange threaded in center used for weld or different types of threaded pipe.
What is the difference between left-hand thread and right-hand thread?
The difference between left- and right-hand thread is that one is turned in a given direction to tighten the fastener, and the other is turned in the opposite direction to tighten the fastener. Let's look a bit more closely.Most fasteners with threads are turned clockwise to tighten them. (This is true for a nut, and for a bolt, you'd be looking at the head with the threads away from you.) These are right-hand threaded fasteners. These fasteners are turned counter-clockwise to loosen them, as you might have guessed. With left-hand fasteners just the opposite is true when tightening them or loosening them.We make left hand fasteners for special purposes. We'd have to have a reason to make "backwards" threads on a fastener, wouldn't we? We do, and most applications where we see left-hand threaded fasteners involve attaching rotating parts. A lawn mower blade is a good example, and by looking at the physics, it will become obvious.A lot of blades on lawn mowers attach to the shaft of the motor with a nut or a bolt. You know the machine we're talking about. The motor shaft points straight down, and the blade is a "cutter bar" with the ends sharpened. Anyway, if the motor on the machine turns clockwise (looking at the motor from the bottom where the blade is attached), using a fastener that turns clockwise to tighten it (a right-hand threaded fastener) sets the stage for a problem. Roll up your sleeves and look at the physics.When the motor starts, it "torques" the shaft clockwise. The blade and the fastener that hold the blade are likewise torqued clockwise. But consider mean old inertia. Inertia is the name we give to the phenomenon associated with objects that have mass (like the fastener that holds the blade on). If a body is at rest, it wants to remain at rest. If it's in motion, it wants to remain in motion. Force is necessary to change the motion of a mass because of inertia. That said, let's focus on the bolt that holds the blade on the motor.If the bolt on the motor shaft of a lawn mower turns clockwise and a right-hand threaded bolt holds the blade on, the inertia of the bolt when it's at rest makes it "resist" the torque of the motor, which is clockwise. The effect on the bolt is that the bolt's inertia makes it want to turn counter-clockwise. And counter-clockwise is the direction we'd turn the fastener to take it off. If the motor is started time and time again, it applies a little torque in the "wrong" direction to the bolt that holds the blade on. If the bolt ever becomes a bit loose, it can easily be spun off, which will cause the blade to detach. If the blade comes off while the machine is running at speed, that blade becomes a lethal projectile.Left-hand threads are applied in a number of applications, and most involve rotating parts. It costs more to make left-hand threaded fasteners because the volume in which they are produced is lower. The economy of scale makes the right-hand threaded fasteners cheaper, and they would be a manufacturers choice if not for the engineering considerations associated with the rotating parts of a machine. Left-hand threaded fasteners are made for a specific application where right-hand threaded fasteners would be a fool's choice.
Why is slide fastener a good name for a zipper?
slide fastener is a common name but it's effect to a people that use zipper.
What is meant by 'grade' in cement?
The grade refers to the characteristic strength of the material below which not more than 5 percent of the test results are expected to fall.
What is a nut?
In mechanical terms,a nut is a type of fastener with a threaded hole.
What is a homograph for a metal fastener that starts with s?
A homograph for a metal fastener that starts with "s" is "screw." This word can also refer to turning or twisting a threaded metal fastener.
The grade of a fastener such as a bolt is a measure of its?
Hardness
What rockwell c hardness is grade 10.9?
The Rockwell C Hardness for a grade 10.9 fastener is 32 - 39HRC or 320 - 380Hv10
Difference between 10.9 and 12.9 tensile bolts?
Grade 10.9 bolts or capscrews have a minimum tensile strength of 1040N/mm2 and a hardness of 320 - 380Hv10. Grade 12.9 bolts or capscrews have a minimum tensile strength of 1220N/mm2 and a hardness of 385 - 435Hv10. The 12.9 fastener is therefore a higher grade (hardness and tensile strength) fastener compared with 10.9 grade
How many radical strokes appear on the head of an SAE grade 8 fastener?
An SAE Grade 8 bolt will have 6 radial lines on it as shown below. \ | / / | \
What is the 2nd meaning of nut?
The two primary meanings are: 1. The seed container for certain trees and bushes, analogous to a fruit seed 2. A metal fastener used with a threaded bolt
What is a collar fastener?
Another word for a fastener is a snap. A collar fastener is a fastener or snap that is used on a collar.
How far back in time does the fastener industry go?
In the fifteenth century threaded fasteners began to appear in common usage. In this century, the first printing press was held together and run by a screw.
What is the diff b w bolts and screws?
A screw is self fastening, as it bores out and threads the hole it goes into. A bolt does not bore out its own hole, and requires an additional fastener (a nut) if if goes into a hole which is not threaded.
What are the uses of nuts and bolts?
Nuts and bolts have a number of uses, the "broad" definition would be: * bolt - A headed and externally threaded fastener designed to be assembled with a nut. * nuts - An internally threaded product intended for use on external or male screw threads such as a bolt or a stud for the purpose of tightening or assembling two or more components.
What does one mean by a snap fastener?
A snap fastener is a fastener used on clothing. Usually this type of fastener makes a 'snap' noise when it is fastened. Another word for 'snap fastener' would be 'press stud'.
