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What type of fittings do old American vehicles generally use, is it UNC or UNF ??
I'm trying to buy some replacements here in the UK and its quite confusing, especially when you throw in Metric and BSF to the mix.

Thanks

HELLO, MY TRUCK IS A 62, CAME FROM THE GREEK ARMY, AND IT STILL IS IN GREECE. I HAVE UNDONE PREETY MUCH EVERY BOLT AND NUT ON IT, AND I ALWAYS FOUND IT TO BE INCH BOTH THEIR THREADS AND WRENCH/SOCKET SIZE. WHEN I NEEDED TO REPLACE SOME, I WAS ABLE TO FIND THE RIGHT THREAD/DIAMETER SIZE BUT USUALLY WITH A METRIC SIZE HEAD CLOSE TO THE ORIGINAL SIZE HEAD THAT WAS INCH. ALTHOUGH IT GETS THE WORK DONE, IT SURE SUCKS BECAUSE I HAVE TO CARRY BOTH STANDARD AND METRIC SETS IN MY TOOLBOX, UNLESS I CAN AFORD TO REPLACE ALL BOLTS AND NUTS.

Stu,
I found the ORD 9 SNL G-741 Parts Manual very helpful in identifying bolt sizes and threads when I was doing my truck.

Sal

Both UNC and UNF thread pitches are used about the same amount on the truck. Usually UNF is used where greater strength or higher torques are needed and UNC in generally used in less critical areas.

What type of fittings do old American vehicles generally use

This phrase can mean several things here in the US where threaded bolts and screws are referred to as fasteners and fittings are used in piping and hose connections.

cuz wrote:Both UNC and UNF thread pitches are used about the same amount on the truck. Usually UNF is used where greater strength or higher torques are needed and UNC in generally used in less critical areas.

What type of fittings do old American vehicles generally use

This phrase can mean several things here in the US where threaded bolts and screws are referred to as fasteners and fittings are used in piping and hose connections.

Thanks for the help guys, at least I know what to look for now.
Cuz, I know what you mean, I shouldnt have used that phrase, it is a bit open-ended!
I meant threaded bolts.

Cheers

SOTVEN wrote:HELLO, MY TRUCK IS A 62, CAME FROM THE GREEK ARMY, AND IT STILL IS IN GREECE. I HAVE UNDONE PREETY MUCH EVERY BOLT AND NUT ON IT, AND I ALWAYS FOUND IT TO BE INCH BOTH THEIR THREADS AND WRENCH/SOCKET SIZE. WHEN I NEEDED TO REPLACE SOME, I WAS ABLE TO FIND THE RIGHT THREAD/DIAMETER SIZE BUT USUALLY WITH A METRIC SIZE HEAD CLOSE TO THE ORIGINAL SIZE HEAD THAT WAS INCH. ALTHOUGH IT GETS THE WORK DONE, IT SURE SUCKS BECAUSE I HAVE TO CARRY BOTH STANDARD AND METRIC SETS IN MY TOOLBOX, UNLESS I CAN AFORD TO REPLACE ALL BOLTS AND NUTS.

I dont mind replacing the bolts with metric but the problem is the ones that have the nut welded to the truck. I am in the middle of replacing all the wood in the bed of my truck and I used M8 stainless steel coach bolts and they look
real good. Will post a pic when I'm done.

Cheers

You'll find on all M Series military trucks that the bolts used are fine threads with 2 exceptions; course threads are used where the threads are cut into cast iron parts, such as the engine block and other engine components, the transmission, transfer case, steering knuckle housings, etc, or aluminum housing like the LU4 winch. Fine threads will not hold up in cast iron or aluminum, fine threads are not deep enough to hold up in softer materials. The 1 exception I can think of with this is on the Jeep M715 truck steering knuckle housings. They used fine threads in the cast housing; I've seen MANY that were stripped out as a result, we have repaired many a bolt hole in these.

MSeriesRebuild wrote:You'll find on all M Series military trucks that the bolts used are fine threads with 2 exceptions; course threads are used where the threads are cut into cast iron parts, such as the engine block and other engine components, the transmission, transfer case, steering knuckle housings, etc, or aluminum housing like the LU4 winch. Fine threads will not hold up in cast iron or aluminum, fine threads are not deep enough to hold up in softer materials. The 1 exception I can think of with this is on the Jeep M715 truck steering knuckle housings. They used fine threads in the cast housing; I've seen MANY that were stripped out as a result, we have repaired many a bolt hole in these.

Thanks Charles, just the info I was looking for.

cuz wrote:

What type of fittings do old American vehicles generally use

This phrase can mean several things here in the US where threaded bolts and screws are referred to as fasteners and fittings are used in piping and hose connections.

This exchange reminds me of my assignment to England. As far as my English friends and I were concerned, the US and the UK were "two countries separated by a common language." We soon learned to deal with it, though.

Lifer wrote:

cuz wrote:

What type of fittings do old American vehicles generally use

This phrase can mean several things here in the US where threaded bolts and screws are referred to as fasteners and fittings are used in piping and hose connections.

This exchange reminds me of my assignment to England. As far as my English friends and I were concerned, the US and the UK were "two countries separated by a common language." We soon learned to deal with it, though.

I know what you mean Lifer, I have picked up a lot of US lingo from this forum !!