shop i worked in made drive shafts f gravel shakers,we used AN nuts to retain bearing and washer f bearing. AN nut had 4 notches.AN did stand F army-navy.AN standards date toWW2. no i do not date to WW2.castle nuts are fo use where shaft has hole in center of it ,and nut needs to be retained in position.usually a cotter pin goes through hole in shaft and into notch in castle nut,keeping nut from moving.

Correct spelling for "jesus nut" = JAYsus! nut.

For obvious reasons.

Jim

I don't know what you call your circular nuts. 2D nuts sound painful. Mine are 3-D, and more spherical or perhaps ovoid.

The guys that set up Ford 9" differentials have always called them "preload" or "backlash" nuts for bearing and gear preload.

JAckal

I'm going to have be real careful what I say around, you aren't I?


I was referring to the fastener arrangement.

I've already told you all that it's called a gland nut but, no, you won't listen to me. OK for you all.

Can you provide a pointer to it's usage?

It's just that I have always known 'glands' as compression joints and the 'gland-nut' as the special nut, tapered internally to compress the gland

I believe that a company has a trademarked name for a nut of that style: "super nut". The idea is that instead of torquing a large single nut, you torque several smaller screws.

Edit: correction: Superbolt is the trademarked name. They have nut style ones as well. http://superbolt.com/

BTW, that vessel was not originally an autoclave, but a reaction vessel. It says "Parr Instrument company" on the side. I've got one similar in the lab around here. Yours pictured looks modified.

BTW, the capstan nut and capstan head screws for me come from the context of survey instruments. I don't know about the current modern stuff, but stuff prior to 1980's or so that was non-electronic, had capstan head screws and capstan nuts for adjustment. A bar was inserted to turn them. I can reference the book Surveying by Moffitt and Bouchard.

I've also referred to them as pin spanner nuts as well. I know that spanner has a different meaning on the English side of the pond.

cant be a gland nut because every valve i work on has a hexagonal gland nut to force the gland packing around the stem and thier all hexagonal.
i'm thinking more pin spanner type things myself, but its only an opinion
i like capstan but surveyors came up withy tribrach so anyones game as yet
this is fun or am i mad
mark

Generally, you will find references to a gland nut in early British bike manuals. Norton, BSA, Vincent, Matchless, AJS, Velocette, James, Rudge, Royal Enfield, Sunbeam, etc. It's a common British term that I learned when I learned other terms such as gudgeon pin (wrist pin), paraffin (kerosene), waste (oily rags), dope (alcohol fuel), spanner (wrench), purchase (leverage on a wrench), panel beater (auto body shop), breaking (wreckng), etc. There are many, many more but I can't think of them right now.

Being tapered may or may not be a feature of a gland nut.