M416 Lug Nut Torque

1stSgtUSMC · Post by **1stSgtUSMC** » Sat Apr 18, 2020 5:51 pm

What is the M416 lug nut torque?

S/F

Kevin

RonD2 · Post by **RonD2** » Sat Apr 18, 2020 8:22 pm

Hi Kevin,
After you know the size of any fastener in question, you can easily Google "SAE torque table" and you'll get many hits for torque value for any nut-bolt combination, including M416 lug nuts --- which just happen to be 1/2-20 thread size/pitch (threads per inch). The M416 lug nuts also happen to be the same size as the lug nuts on your M38 and naturally use the same torque value.

The easy answer: 60-75 foot-pounds. I do 65 on mine.

I should add, because I don't know how familiar you are with mechanics, that lug nuts should be torqued every other one opposite each other. In other words, don't torque them each next to each other (going clockwise or counter-clockwise from one to the next).

Obtaining a set of tech manuals is essential to this hobby and will assist you greatly in identifying what size and material nut and bolt you're dealing with. I highly recommend them. Big difference between Grade 2, Grade 5, and Grade 8 nuts and bolts. Mix and match or use them in the wrong place or torque them to the wrong value and you're in for quite a learning experience!

I won't bother posting it because the answer would be the same, but I see you ask the same question over on the G503 forum.

Did you see my PM about jerry can racks?

Good luck!

Post by **wesk** » Sat Apr 18, 2020 11:16 pm

Good advice Ron. Your torque spec was close but the TM 9-2330-251-14P dated 1962 under preventative maintenance page 5 says 60-65 Ft Lbs.

RonD2 · Post by **RonD2** » Sat Apr 18, 2020 11:32 pm

My bust!

I picked the spec out of the Willys Service Manual for lug nuts.

I keep forgetting that not all manuals were created equal, and I should know better by now!

Post by **wesk** » Sat Apr 18, 2020 11:57 pm

The industry standard for selecting the correct torque is:

1 - Check maintenance instructions in the appropriate manual for a listed task specific torque value then use it correctly.

2 - If there was no task specific torque values listed in the maintenance procedure in the appropriate manual then go to that equipment's general torques source for the torque setting.

3 - If that equipment doesn't offer a general torque chart or their chart does not include the thread pitch/fastener diameter/fastener class needed then go to an industry standard torques chart.

For our member's needs I have all these charts in my photo album.

1stSgtUSMC · Post by **1stSgtUSMC** » Sun Apr 19, 2020 4:56 am

These are all great replys! I couldnt find the info in my TM. Thank you very much.

S/F

Kevin

Post by **wesk** » Sun Apr 19, 2020 11:47 am

Kevin, there are several editions of that TM. Which one are you using? I have 3 of them, 1962, 1970 & 1990. I know there's also a 1985 out there. 1962 shows 60-65, 1970 shows no torque value, and 1990 shows an unbelievable 85 Ft Lbs.

Some links to PDF copies:

1990 - http://www.jatonkam35s.com/M105TMS/TM9- ... 1-14&P.pdf
1970 - http://jeepdraw.com/TM_9-2330-251-14.pdf

1962 - Is still loading on my cloud. As soon as it finishes loading I'll add it to our Downloads Page.

Post by **wesk** » Sun Apr 19, 2020 7:12 pm

I now have the 1962 manual loaded to our downloads page: http://www.willysmjeeps.com/v2/modules. ... it&lid=186

1stSgtUSMC · Post by **1stSgtUSMC** » Mon Apr 20, 2020 6:57 am

It scrazy, TM 9-2330-251-14&P dated Sept 1990 states 85 lbs....I wonder why sch a difference in torque?

S/F

Kevin

Post by **wesk** » Mon Apr 20, 2020 10:55 am

Probably the result of an un-acceptable lost wheel record over the years.