why do bolts have shanks ?

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https://www.nord-lock.com/insights/bolting-tips/2015/benefits-of-bolt-shanks/

The Benefits of Bolt Shanks – Nord-Lock Group
https://www.nord-lock.com/insights/bolting-tips/2015/benefits-of-bolt-shanks/
The shank is the threadless part of the bolt between the head and thread. There are two main ways of using the shank of the bolt. One is to make the shank increase the shearing capacity. The other way is to reduce the shank to increase the elastic resilience of the joint. Under shear load (see the illustration), the bolt experiences force perpendicular to its axis. Shanks with larger areas and the absence of stress concentration points increase the bolt’s performance in shear loading. For …

https://www.albanycountyfasteners.com/blog/why-do-some-bolts-have-shoulders/

Why Do Some Bolts Have Shoulders? | Albany County Fasteners
https://www.albanycountyfasteners.com/blog/why-do-some-bolts-have-shoulders/
If a load is pulling sideways against the unthreaded area of a bolt then the bolt will be less likely to snap as the areawhere the pressure is being placed is stronger than the threaded portion. The second reason for a shank is to allow for more versatile uses. This shank can act as an area for something attached to the bolt to be moved around.

https://www.albanycountyfasteners.com/blog/why-do-wood-screws-have-a-shank/

Why Do Wood Screws Have A Shank? | Albany County Fasteners
https://www.albanycountyfasteners.com/blog/why-do-wood-screws-have-a-shank/
The shank allows for heat dispersion in a screw. As the threads begin creating heat, it moves up into the shank which will take longer to heat up and will not generate nearly the same amount of friction when it goes through the wood.

https://en.wikipedia.org/wiki/Bolt_(fastener)

Bolt (fastener) – Wikipedia
https://en.wikipedia.org/wiki/Bolt_(fastener)
For this reason, many bolts have a plain unthreaded shank (called the grip length) as this makes for a better, stronger dowel. The presence of the unthreaded shank has often been given as characteristic of bolts vs. screws, [3] but this is incidental to its use, rather than defining.

https://golferlogic.com/the-shanks/

The Shanks: What Causes Them? (And How To Cure Them …

The Shanks: What Causes Them? (And How To Cure Them)

So in my case, the shanks were caused by the hosel getting to the ball before the clubface. But you can still shank the ball just fine with a square face. If your hands move too far away from your body during the downswing, your strikes are going to start getting closer and closer to the heel.

https://www.engineerlive.com/content/bolts-waisted-shanks-put-rail-company-back-track

Bolts with waisted shanks put rail company back on track …
https://www.engineerlive.com/content/bolts-waisted-shanks-put-rail-company-back-track
Since we use bolts with waisted shank, we increased the availability of the locomotives, says Mr Hans-Peter Luethi, Strategic Purchasing at SBB. At the same time, we could significantly reduce maintenance and repair costs. Furthermore, the bolts with waisted shank prevent displacement against each other. A larger diameter in the segment under load leads to increased shearing resistance. The elastic thin shaft guarantees high safety when tightening beyond the yield point …

https://diy.stackexchange.com/questions/81557/why-do-lag-screws-have-the-unthreaded-body-between-the-head-and-the-threads

bolts – Why do lag screws have the unthreaded body between …
https://diy.stackexchange.com/questions/81557/why-do-lag-screws-have-the-unthreaded-body-between-the-head-and-the-threads
And you can find bolts that have shanks narrower than the threaded portion. Those are produced to allow uniform stiffness over the bolt, where a thicker shank would be too stiff. (Engine head bolts are the common example I can think of there.)

https://golf-info-guide.com/golf-tips/playing-conditions/causes-cures-the-shank/

Causes & Cures: The Shank – Golf Tip

Causes & Cures: The Shank – Golf Tip

A shank occurs when the ball strikes the club’s hosel – the part where the shaft and head connect – and darts almost directly to the right (left for a lefty). Nearly all shanks are hit with irons, as the hosels on woods and hybrids are usually placed out of harm’s way.

https://usgolftv.com/instruction/golf-shank-secrets/

Golf Shank Secrets: Why it Happens & How to Fix It – USGolfTV

Golf Shank Secrets: Understanding and Correcting

Do your arms travel out and across, rising above the swing plane of your backswing? Most high handicappers have a habit of doing exactly that. They bring their arms too far out in the transition. This in turn exposes the heel and hosel to the ball at impact, causing the shank. Why Low Handicappers Shank the Golf Ball

https://blox-fruits.fandom.com/wiki/Saber_Expert

Saber Expert | Blox Fruits Wiki | Fandom
https://blox-fruits.fandom.com/wiki/Saber_Expert
The Saber Expert, or Shanks is a boss, who is only accessible if you are level 200. You have to do a certain quest to access his area. After defeating Shanks, he can drop the legendary sword, Saber. (Note: Only one person is able to get the drop, so fighting him with other players is not recommended unless they already have the sword) Below is a link to a guide to solving the puzzle you need …