I believe that you are laboring under several misconceptions.
FIRSTLY: A Crescent wrench is actually properly identified as an "adjustable wrench." CRESCENT is the name of the company who first produced it for sale in the United States. Many people don't know that there is a wrong, and a right way to use one. The correct way to use one is with the crescent shaped part on top of the nut or bolt when pulling down. That puts all the stress on the strong jaw and prevents it's "Knuckle buster" nickname from becoming true.
SECONDLY: A "MONKEY WRENCH" looks very much like a "Pipe Wrench," or being true to the company who first produced a toothed-jawed pipe wrench for sale in the USA; A "Stilson Wrench." The main difference between a pipe wrench and a monkey wrench is that the monkey wrench was made for turning unions, flange bolts, and other things that the serrations of a pipe wrench's jaw would ruin.
THIRDLY: A "SPANNER WRENCH" is a highly specialized wrench that spans the distance across an axle or other item, to engage the two pins of the spanner into the two slots cut into the face of a nut that was made without shoulders for a wrench to grasp onto. You may be able to see that it was called a spanner because it spans an area where a regular wrench would have a hard time doing the same. One of the most common applications for a "spanner wrench" is for tightening the wheel bearings on the front or rear axle of a bicycle. I also have a spanner wrench for changing the grinding wheel on my hand-held 5" electric grinder.
I hope that clears it up for everyone.
FIRSTLY: A Crescent wrench is actually properly identified as an "adjustable wrench." CRESCENT is the name of the company who first produced it for sale in the United States. Many people don't know that there is a wrong, and a right way to use one. The correct way to use one is with the crescent shaped part on top of the nut or bolt when pulling down. That puts all the stress on the strong jaw and prevents it's "Knuckle buster" nickname from becoming true.
SECONDLY: A "MONKEY WRENCH" looks very much like a "Pipe Wrench," or being true to the company who first produced a toothed-jawed pipe wrench for sale in the USA; A "Stilson Wrench." The main difference between a pipe wrench and a monkey wrench is that the monkey wrench was made for turning unions, flange bolts, and other things that the serrations of a pipe wrench's jaw would ruin.
THIRDLY: A "SPANNER WRENCH" is a highly specialized wrench that spans the distance across an axle or other item, to engage the two pins of the spanner into the two slots cut into the face of a nut that was made without shoulders for a wrench to grasp onto. You may be able to see that it was called a spanner because it spans an area where a regular wrench would have a hard time doing the same. One of the most common applications for a "spanner wrench" is for tightening the wheel bearings on the front or rear axle of a bicycle. I also have a spanner wrench for changing the grinding wheel on my hand-held 5" electric grinder.
I hope that clears it up for everyone.
