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What are the differences between different forms of washers?
There are several different forms of flat washers, designated by a letter code from A to G. Some are only available in a particular finish, but what exactly do the different forms stand for?...
Metric standard thread pitch table
Metric threads for standard thread bolts....
Metric bolt heads & spanner / hex key sizes
Metric nut dimensions
These charts show the dimensions of a number of the nuts that we currently sell. These dimensions have a tolerance of +/- 1mm.....
Bolt grade markings & strength
Except for the very lowest grades metric nuts and bolts all carry identification markings which indicate their strength. On the head of each bolt there are two numbers which are separated b...
Metric recommended bolt torque
The maximum recommended torques given in the table below assume that the threads have been lightly oiled. Doing a bolt up to a specific torque should set the tension in the bolt to appeoxim...
Lengths of thread on hexagon bolts
This fasteners basics sheet from bolt depot in the USA covers the basic definitions of standard fastener types....
Metric & imperial conversion table
How bolts are made
Fasteners are manufactured in a wide range of materials from common steel to titanium, plastic and other materials. Many materials are further separated into different grades to describe spec...
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