1971 K/10 longer front wheel studs? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**paul blair** · 09-08-2023, 05:45 PM

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** · 09-08-2023, 10:15 PM

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

**Steeveedee** · 09-08-2023, 10:25 PM

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** · 09-09-2023, 12:03 AM

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

**paul blair** · 09-09-2023, 08:14 AM

Quote:

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** · 09-09-2023, 09:56 AM

Quote:

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 · 09-09-2023, 10:10 AM

Quote:

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** · 09-09-2023, 11:58 AM

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 · 09-09-2023, 12:00 PM

Tire shops may also have studs...

**kwmech** · 09-09-2023, 12:32 PM

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 · 09-09-2023, 04:45 PM

Quote:

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** · 09-09-2023, 07:15 PM

Quote:

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** · 09-09-2023, 11:04 PM

Quote:

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 · 09-11-2023, 09:48 PM

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 · 06-10-2024, 04:55 PM

Quote:

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 · 06-10-2024, 07:05 PM

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** · 06-11-2024, 08:12 AM

Correct 1970 K10 FRONT studs are GM 3829376.

Dorman number is 610-041

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

Mav · 06-11-2024, 08:35 AM

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** · 06-11-2024, 11:16 AM

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 · 06-11-2024, 11:39 AM

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** · 06-11-2024, 04:17 PM

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 · 06-11-2024, 04:59 PM

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 · 06-11-2024, 05:13 PM

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

**kwmech** · 06-11-2024, 08:55 PM

Quote:

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 · 06-11-2024, 09:43 PM

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

09-08-2023, 05:45 PM	#1
paul blair Senior Member Join Date: Jan 2016 Location: massachusetts Posts: 329	1971 K/10 longer front wheel studs? 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........... Attached Images

09-08-2023, 10:15 PM	#2
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: 1971 K/10 longer front wheel studs? Have you taken a stud in to a good auto parts supplier to match one up? How long is what you have? __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

09-08-2023, 10:25 PM	#3
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,674	Re: 1971 K/10 longer front wheel studs? 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. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

09-09-2023, 12:03 AM	#4
67 twins Senior Member Join Date: Mar 2019 Location: Herculaneum MO (20 minutes south of St. Louis Posts: 648	Re: 1971 K/10 longer front wheel studs? Tell me I'm wrong but I'm pretty sure 71 has 1/2-20 studs, not 7/16-20 __________________ 67 C10 283 T5 swapped longbed fleetside = wife's daily driver 67 C20 292 (originally a 250)4speed longbed fleetside w/original wooden bed=my project truck 67 C10 283+.060 (so a 292 as well)T5 swapped longbed fleetside=my DD 72 C1500 Sierra Grande 350 TH350 longbed fleetside=wife's fair weather truck Can you tell we are fans of longbed fleetsides & 67s Chris

09-09-2023, 11:58 AM	#8
ga-stepside Senior Member Join Date: Jan 2016 Location: Sugar Hill GA Posts: 369	Re: 1971 K/10 longer front wheel studs? 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. __________________ 1967 C10 Step side 1970 AMX 390 1977 Datsun 280Z highly modified with '95 LT1 power

09-09-2023, 12:00 PM	#9
HotWheelsFan Registered User Join Date: Mar 2010 Location: Oregon Posts: 189	Re: 1971 K/10 longer front wheel studs? Tire shops may also have studs... __________________ 1970 C20 Long Bed Fleetside - Restoration My truck videos - Youtube

09-09-2023, 12:32 PM	#10
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,628	Re: 1971 K/10 longer front wheel studs? 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. Last edited by kwmech; 06-11-2024 at 11:17 AM.

09-11-2023, 09:48 PM	#14
Orange Crate Registered User Join Date: Feb 2011 Location: Under the Truck Dreaming Posts: 751	Re: 1971 K/10 longer front wheel studs? 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.... __________________ 72 K20 Custom Camper, D60, 14BFF, full roller 406 TPI w custom built ECU and yes..it has tow hooks...and a 5 speed

06-10-2024, 07:05 PM	#16
Mav Registered User Join Date: Jun 2016 Location: Richland Or. Posts: 115	Re: 1971 K/10 longer front wheel studs? 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

06-11-2024, 08:12 AM	#17
1970cstblazer All stock and staying that way Join Date: Jul 2003 Location: Elkland, PA Posts: 1,824	Re: 1971 K/10 longer front wheel studs? Correct 1970 K10 FRONT studs are GM 3829376. Dorman number is 610-041 Dimension is 7/16"x20 1 3/8" long __________________ 1970 K/5 Blazer CST 4WD, Medium Bronze, 93k ACT. miles, 350, 4 speed, rear positraction, 16.5" x 8.25" HD wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration finally getting close to completion.. 1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... 2017 Sierra 1500 SLT 4WD, Black, 45k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 62k miles, 3.6, 8L45, 3.23 LS, 18" wheels

06-11-2024, 08:35 AM	#18
Mav Registered User Join Date: Jun 2016 Location: Richland Or. Posts: 115	Re: 1971 K/10 longer front wheel studs? 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...

06-11-2024, 11:16 AM	#19
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,628	Re: 1971 K/10 longer front wheel studs? 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.

06-11-2024, 11:39 AM	#20
Mav Registered User Join Date: Jun 2016 Location: Richland Or. Posts: 115	Re: 1971 K/10 longer front wheel studs? 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....

06-11-2024, 04:17 PM	#21
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,628	Re: 1971 K/10 longer front wheel studs? 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 Last edited by kwmech; 06-11-2024 at 04:22 PM.

06-11-2024, 04:59 PM	#22
Mav Registered User Join Date: Jun 2016 Location: Richland Or. Posts: 115	Re: 1971 K/10 longer front wheel studs? 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



Register or Log In To remove these advertisements.

06-11-2024, 05:13 PM	#23
Mav Registered User Join Date: Jun 2016 Location: Richland Or. Posts: 115	Re: 1971 K/10 longer front wheel studs? Checked again, we are both right? Shows the 041 w/ .561 in bold type, farther down in specs it shows .575.... ??

06-11-2024, 09:43 PM	#25
Mav Registered User Join Date: Jun 2016 Location: Richland Or. Posts: 115	Re: 1971 K/10 longer front wheel studs? 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

Register or Log In To remove these advertisements.