How is This Part Called in English?

It's called a swivle clevis.

A two ended clevis that doesn't swivel is a double clevis.

It's a type of swivel link.

A double clevis.

It is not obvious if it swivels around the centre bolt, but if it does, its called a "swivel fork".

Not to get too technical, but this is a swivel clevis.

Your references sir? I provided mine. I was thinking of calling it a swivel clevis until I could not find a catalogue reference. Forks though....found lots of those.

(I can be pedantic too....)

Sounds reasonable. Could not find it on google, (except for google images) in any catalogues. But I don't think anybody will fault the OP for calling it a "double swivel clevis". But then, google is not the arbitrator of the English Language. (that would be the oxford dictionary, which calls a clevis a "u shaped iron at the end of a beam for attaching tackle". If we consider the swivel pin to be a "beam", albeit a very short beam, then, yes, it is quite reasonable to call this a "double ended swivel clevis", or "double swivel clevis". I would know what would be specified if I saw that written on a blueprint, and I guess that is all that counts.

But you won't find it listed in a catalogue.

Compound words are a relic of the Germanic background of the English language, and can result in so many problems!

I think I like "Bob" better. same front and back, just like the object, and the word "bob" even looks like the object....rounded at both ends with a link in between. Good call!

You flatter me, and give me far too much credit.

That's just what we called 'em back on the farm.

I had a swivel fork once, it was for eating spaghetti & was battery operated,

Whadya recon 10 points good answer?

Bazzer

I personally would like to call it "Bob"!

Ah, but what does Bob think about that?

"Bob" goes both ways so he won't mind.

I've always understood that Bob goes up and down. Now it seems he also goes round and round.... weeeal, why not!

_{Y'ever met a feller by de name Bob Clevis?...}

Some Bobs are supposed to stay in the same place, while everything else goes up and down, side to side or round and round.

Well this would explain the usage for a 'bob' cut.

_{But not a bob cat.}

These fall under marine hardware and called Swivel self -locking

Link is as below:

http://www.wichard.com/rubrique-Self_locking-0202050600000000-ME.html

Marine hardware > Stainless steel > Swivels > Self-locking

Réf : 2463

Swivel / self-locking / length 80

More information

Réf : 2469

Swivel / self-locking / length 120

More information

Don't know what makes them "self locking" but at least you found it in a catalogue!

My rigging manual is silent on the question. If I was looking at a blue print, I would not know what would be meant by a "swivel self locking", but I would know what a "swivel clevis" or a "swivel fork" might be. The picture is of a clevis. I would specify that on the blue print.

(Then at the bottom in the key, I would put a note stating the catalogue number of that swivel self locking thingy)

(Hate clevis' myself....they take teeth out....)

In fact it is the style of pin, which they call as self locking, other stype they have is " allen head" for which they use name as "swivel allen head"

Their catalogue read as :

Commentary

• HR forged swivel (17.4 Ph) with two openings
• With self-locking pin
• Outstanding working and breaking loads

Applications

• Link two pieces which have different rotation

Material

• HR stainless steel 17.4 PH
  Réf : 2363 Swivel / allen head pin / length 80 More information

  Working load	Breaking load	Weight
  1440 Kg	2800 Kg	99 g

  
  
  Réf : 2369 Swivel / allen head pin / length 120 More information Working

A google search for self locking comes back with nothing. A search on the company website search engine for self locking comes back with nothing. If we consider a language to be a means of communication, we have stumbled badly here.