Inches threads

[gregorio87]

Goodmorning.
I've a question about screws and bolts/nuts of AMC engine, because I usually used mm threads and I don't know inches threads.
I think, with some calculations, to have found the right measures, but can anyone let me knows if I'm in right for these measures, and maybe can explain the pitch of threads for:
Head bolts, 1/2 in, pitch?
Bell housing hooking bolts, 3/8 in, pitch? (I've seen are the same of header and intake manifold hook up screws)
Valve cover bolts, I don't know nothing about it.

Thanks, if anyone knows this data.

Unfortunately all my tools from "Beta tools" are in mm; Beta are the best here, but doesn't sell inches tools.
I have beautiful and useful tools to screw and unscrew threaded barrel, like head bolts, without any problem without any damage of thread, and without boring me with two nuts one next to the others. Unfortunately it can be done only with mm threads.

Are like this:

The barrel can go inside and outside without any forces, but if one turn left or right the barrel, this kind of extractors hook up it.

There are in USA any tools like this?

[Alex22]

I think these are the tools you are looking for, I use this set all of the time. I'm not sure if the tools are made in America though, more and more of the Mac tools are being made in Asia.

http://www.mactools.com/shoponline/prod ... r-set.aspx

SAE thread pitch uses the number of threads per inch. You can also look at it as how many revolutions the bolt needs to make in order to move 1 inch into the threaded hole.

~Alex

[cruiser54]

If need be, many metric tools can be substituted for the SAE.
8mm for 5/16, 11mm for 7/16, 13mm for 1/2, 16mm for 5/8, 19mm for 3/4

[5-90]

If need be, many metric tools can be substituted for the SAE.
8mm for 5/16, 11mm for 7/16, 13mm for 1/2, 16mm for 5/8, 19mm for 3/4

This is somewhat true - they're not directly compatible for instance, 1/2" = 12.7m/m.) Be careful!

Standard screw sizes are on my site in the Tech section, I've been compiling a list there. I'm always looking for additional data!

However, consider that the engine in the XJ is usually SAE, the transmission is usually ISO, the transfer case mixes SAE and ISO, the axles are usually SAE, and the body is probably half-and-half SAE and ISO. If you don't have a decent set of inch AND metric wrenches, why not? Designs in the 1980's were transition years for changing over from SAE to ISO, and most SAE-based engine designs lasted well into the 1990's, if not the 2000's.

For Torx (inside and outside,) all bets are off. The same set of wrenches answers to both SAE and ISO threads!

(I still get screwed up sometimes because I also have a set of Whitworth sockets from years ago, and a handful of spline drives...)

[gregorio87]

I think these are the tools you are looking for

Yes, these are what I have in mind, in inch. Very useful!

many metric tools can be substituted for the SAE.

I know, I already use metric hex keys for inch bolts, because here it's too hard to find inch wrenches. I only have a set of little cheap "cylinder key" with 1/4 drive.
Maybe I will buy in future a inch key kit on ebay from USA.
Unfortunately only measures of hex key can be exchange from mm to inch, and not the threads pitch.

This is somewhat true - they're not directly compatible for instance, 1/2" = 12.7m/m.) Be careful!
Standard screw sizes are on my site in the Tech section, I've been compiling a list there. I'm always looking for additional data!
However, consider that the engine in the XJ is usually SAE, the transmission is usually ISO, the transfer case mixes SAE and ISO, the axles are usually SAE, and the body is probably half-and-half SAE and ISO. If you don't have a decent set of inch AND metric wrenches, why not? Designs in the 1980's were transition years for changing over from SAE to ISO, and most SAE-based engine designs lasted well into the 1990's, if not the 2000's.

Thanks for info. I've seen all bolts from the engine are in inch.
For torx, I've found here a beautiful kit from Kraftwerk (swiss made) of male and female torx like this

I want to buy some new inch bolts because some of my engine are worn and rusted. I have found an ebayer in Italy that sell inch items, but... Hear this: for ten 3/8 hex head bolts, two" length, he ask 21 euros, about 26-27 dollars! Plus shipping. Maybe he advantage to be the only italian that sell this kind of items on ebay, but this is a theft I think.
Also needs 4 long bolts to hook up the block to the support to store and to mount-unmount items from it, because the bolts I've found while I have unmounted the block are too short. I think they have to be 3 inch long...