1971 K/10 longer front wheel studs?

[paul blair]

1971 K/10 front disc brake 6 lug. Need longer threads for thicker hub on aluminum wheels. 7/16 x 20. pic of stock stud. I have searched and have not had any luck. Thanks for any help...........

[special-K]

Have you taken a stud in to a good auto parts supplier to match one up? How long is what you have?

[Steeveedee]

What wheels do you have? In my experience, the nut went far enough into the wheel that it engaged enough of the factory stud threads.

[67 twins]

Tell me I'm wrong but I'm pretty sure 71 has 1/2-20 studs, not 7/16-20

[paul blair]

Originally Posted by special-K

Have you taken a stud in to a good auto parts supplier to match one up? How long is what you have?

Hi Tim, I live on an Island and the only auto parts store couldn't help. The overall length from under the head is 1.750 and needs to be 2in. This is on a friends truck.

[too much stuff]

Originally Posted by 67 twins

Tell me I'm wrong but I'm pretty sure 71 has 1/2-20 studs, not 7/16-20

I think all of the 6 lug were 7/16 and 5 lug was 1/2. So a K truck would be 7/16

[57taskforce]

Originally Posted by too much stuff

I think all of the 6 lug were 7/16 and 5 lug was 1/2. So a K truck would be 7/16

This…

I’ve never messed with this on a half ton but all I can say is don’t believe everything you may find online. I’ve got a front Dana 60 that I wanted longer studs for. Read from the Front 60 bible on pirate and other sites that you could use a different part number stud that was longer… bought those studs and the knurl was in the wrong spot and the diameter was just a tad too big. This is one of those times where you’ll have to physically compare studs to see what you can find in my opinion.

[ga-stepside]

According to Rockauto the 1971 K10 uses Dorman 619-179. That is 7/16x20 with a .562 knurl and is 1 ¾” long.

Searching for “wheel stud 7/16x20 .562 knurl” I found:
JEGS Press-In Wheel Studs 7/16x20 Thread x 2-7/8 Long x .570 Knurl .562-.569 Hole Size 5 Studs Per Package for $13. That knurl is a bit bigger that what you need but should work. (freeze the studs before insertion and use some assembly lube.). Research tells me that you need to have a hole .008-.010” smaller than the knurl.
The other problem is these come in a pack of 5 so you would need 3 packs.

[HotWheelsFan]

Tire shops may also have studs...

[kwmech]

Every time I build a custom front 44 for a chevy I always convert them to a 1/2'' stud. The 7/16 does not really hold up all that well to larger tires and the tire shops crazy tire guys. Blast the lugs on and make sure the torque wrench makes a clicking sound. The conversion stud I use is the Ford stud---Dorman 610-219, and it does require drilling of the rotor and the hub.

[57taskforce]

Originally Posted by ga-stepside

According to Rockauto the 1971 K10 uses Dorman 619-179. That is 7/16x20 with a .562 knurl and is 1 ¾” long.

Searching for “wheel stud 7/16x20 .562 knurl” I found:
JEGS Press-In Wheel Studs 7/16x20 Thread x 2-7/8 Long x .570 Knurl .562-.569 Hole Size 5 Studs Per Package for $13. That knurl is a bit bigger that what you need but should work. (freeze the studs before insertion and use some assembly lube.). Research tells me that you need to have a hole .008-.010” smaller than the knurl.
The other problem is these come in a pack of 5 so you would need 3 packs.

That may get you close but… you have to compare the knurl locations on the stud as well. On the disk brake K trucks the stud presses into the rotor and hub and holds the rotor solid on the back side of the hub. It’s not like the 2WD stuff where the rotor is held captive essentially by the wheel.

[ga-stepside]

Originally Posted by 57taskforce

That may get you close but… you have to compare the knurl locations on the stud as well. On the disk brake K trucks the stud presses into the rotor and hub and holds the rotor solid on the back side of the hub. It’s not like the 2WD stuff where the rotor is held captive essentially by the wheel.

Whoa, I totally missed that in the picture he posted and certainly know nothing about K10s, LOL.

[67 twins]

Originally Posted by too much stuff

I think all of the 6 lug were 7/16 and 5 lug was 1/2. So a K truck would be 7/16

Oh darn I wasn't thinking about it being a K truck.

[Orange Crate]

Take a cool refreshing dip in here....

https://www.dormanproducts.com/pages...are/index.aspx

For some unknown reason I have a pdf version of the available wheel products but cant find a link to that same book.....ahh progress....

[Mav]

Originally Posted by ga-stepside

According to Rockauto the 1971 K10 uses Dorman 619-179. That is 7/16x20 with a .562 knurl and is 1 ¾” long.

Searching for “wheel stud 7/16x20 .562 knurl” I found:
JEGS Press-In Wheel Studs 7/16x20 Thread x 2-7/8 Long x .570 Knurl .562-.569 Hole Size 5 Studs Per Package for $13. That knurl is a bit bigger that what you need but should work. (freeze the studs before insertion and use some assembly lube.). Research tells me that you need to have a hole .008-.010” smaller than the knurl.
The other problem is these come in a pack of 5 so you would need 3 packs.

Am having same problem finding front studs long enough for 70 K10 (drum brakes) Dorman doesn't show a wheel stud w/ part #619-179. (putting on M/T classic 3 wheels).

[Mav]

Should have been 610-179? Doesn't look like thread length is long enough, am going to order 610-156...let ya know how they work. thanks Mav

[1970cstblazer]

Correct 1970 K10 FRONT studs are GM 3829376.

Dorman number is 610-041

Dimension is 7/16"x20 1 3/8" long

[Mav]

Yes, that works for steel wheels, but these MT classic 3s are about half an inch thicker, so need 1 3/4 in. of thread...

[kwmech]

There is nothing available in a longer 7/16'' stud with a .565 knurl in
Dorman. You have to upgrade to a 1/2'' stud and drill the hub hole with a 19/32 drill bit, this will be using the dorman 610-279 and grinding the shouldered tip off a little bit if it is too long for an enclosed nut. It is this or go with a different nut (7/16) that with a shoulder that will capture more threads by going inside the hole of the rim. A tire any larger than a 33 tall will eventually break the 7/16'' studs if you are out wheeling and not keeping on top of keeping them torqued down properly. Even at that, they will eventually break. Some trucks I have even converted them to a 9/16'' stud when customers insist on running a 40 or 44'' tire on a dana 44, that's a whole different story about carnage.

[Mav]

Am showing dorman 610-156 has an uhl of almost 1 3/4. Knurl is .557 ,just short of stock .561, if they go in too sloppy put some epoxy on? Only have 30 1/2 in. tires and I got over the muddin, etc. years ago. No doubt your method will work and be tougher, just don't want to drill out brake drums, at least not yet....

[kwmech]

A 610-156 has the knurl in the rotor position where it will not do a thing due to the larger hole in the rotor, not the hub where it locks it in. So that's not going to work. Try again


EDIT: Sorry missed the drum brake application ---try the 610-114, They'll press in tighter as the knurl is 582 where-as the 610-041 is 575

[Mav]

What I looked at showed the 610-041 with a .561 knurl, and the 156 w/ .557, am getting mine on Dormans site. You have a better source? thanks

[Mav]

Checked again, we are both right? Shows the 041 w/ .561 in bold type, farther down in specs it shows .575.... ??

[kwmech]

Originally Posted by Mav

What I looked at showed the 610-041 with a .561 knurl, and the 156 w/ .557, am getting mine on Dormans site. You have a better source? thanks

lets try this

[Mav]

Nice! Thanks! That is 2 for the .575 and still 1 on .561, am guessing the .575 is right, I emailed Dorman earlier and asked about discrepancy, haven't heard back yet. If so your specs indicate 114 would be closer than 156 (knurl). Shoulder is between knurl and threads? Don't know how much that matters....only advantage of the 156 is 1/16 in. longer. Already had Napa order the 156 early this am, after I said I couldn't use the 041s I had him order yesterday, don't want to wear out my welcome....so at least I will check the fit before asking them to take back a second set, thanks again for PDFs