Need help with hurst T handle
Thread Starter
Melting Slicks
Joined: Jan 2003
Posts: 2,056
Likes: 0
From: monroe city mo
Need help with hurst T handle
Im wanting to put a hurst T handle on my car,but they dont come in the 9/16 x 18 threads. I thought i would get one, fill the hole with JB weld,then drill and tap for the corvette threads. This may be a dumb question, but what size hole would i drill before tapping,would it be a 9/16? Ive never done this before so i could use some advice. Thanks Guys
Instructor
Joined: Jan 2005
Posts: 152
Likes: 0
From: Mentor Ohio
I don't have an answer to your question. However, I have used 'T' handles on the corvette shifters and really hated it. Made shifting very difficult. The 'T' handles places to much of the directional force of the shift on the top of the shaft making shifting difficult and awkward.
Just my thoughts from experience before you go throught all the trouble.......
Just my thoughts from experience before you go throught all the trouble.......
Team Owner
Joined: Mar 2007
Posts: 35,183
Likes: 2,125
From: Right Corner Pocket of Illinois
No-IL Events Coordinator
2026 Corvette of the Year Finalist - Unmodified
2025 C6 of the Year Winner - Unmodified
2020 C6 of the Year Finalist - Unmodified
2020 Corvette of the Year Finalist (appearance mods)
2019 C6 of Year Winner (appearance mods)
2018 C6 of Year Finalist
St. Jude Donor '12 thru '26
Coarse Pitch
9/16-12 UNC
Tap Drill: 31/64
Fine Pitch
9/16-18 UNF
Tap Drill: 33/64
http://www.newmantools.com/tapdrill.htm
9/16-12 UNC
Tap Drill: 31/64
Fine Pitch
9/16-18 UNF
Tap Drill: 33/64
http://www.newmantools.com/tapdrill.htm
Thread Starter
Melting Slicks
Joined: Jan 2003
Posts: 2,056
Likes: 0
From: monroe city mo
Coarse Pitch
9/16-12 UNC
Tap Drill: 31/64
Fine Pitch
9/16-18 UNF
Tap Drill: 33/64
http://www.newmantools.com/tapdrill.htm
9/16-12 UNC
Tap Drill: 31/64
Fine Pitch
9/16-18 UNF
Tap Drill: 33/64
http://www.newmantools.com/tapdrill.htm
Race Director
Joined: Jan 2006
Posts: 10,554
Likes: 33
From: Not on either liberal coast.
The original hole/thread pitch on the HURST T-handle **** is probably 3/8-16" unless drilled out during its lifetime (if used). Why would you need to fill the hole and drill a larger 9/16-18" hole/thread pitch?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Melting Slicks
Joined: Jan 2003
Posts: 2,056
Likes: 0
From: monroe city mo
Well,good point. I dont know why i thought the hole would have to be filled and redrilled.It sure would be easier to just make the hole bigger.
Race Director
Joined: Jan 2006
Posts: 10,554
Likes: 33
From: Not on either liberal coast.
The only issue I could see if that the threads on the KIRBAN are long and the amount of threads inside the HURST T-handle might not be able to accept all of the threaded lever. Some of the threaded lever might show, which could be covered with the boot or cut off to the desired length you had in mind. You'll need a bottom tap to cut the 9/16-18" to full depth.
Thread Starter
Melting Slicks
Joined: Jan 2003
Posts: 2,056
Likes: 0
From: monroe city mo
The only issue I could see if that the threads on the KIRBAN are long and the amount of threads inside the HURST T-handle might not be able to accept all of the threaded lever. Some of the threaded lever might show, which could be covered with the boot or cut off to the desired length you had in mind. You'll need a bottom tap to cut the 9/16-18" to full depth.
Race Director
Joined: Jan 2006
Posts: 10,554
Likes: 33
From: Not on either liberal coast.
I'm not a machinist so I might not be the best source of information on this. It's my understanding that a bottom tap will cut the threads all the way to the bottom of the hole. A regular tap is a little tapered at the tip and will stop short of the bottom.
I use MCMASTER-CARR for most of my fasteners and related hardware needs. Someone else might chime in with other sources.
I'd bet if you do an internet search on "bottom tap" or "taps and dies", you'd find other sources as well.
I use MCMASTER-CARR for most of my fasteners and related hardware needs. Someone else might chime in with other sources.
I'd bet if you do an internet search on "bottom tap" or "taps and dies", you'd find other sources as well.
Le Mans Master
Joined: Sep 2003
Posts: 8,847
Likes: 795
From: Longview Texas
Exactly right. A regular tap is pointed on the end so it is easier to start in an untapped hole. The bottom tap is squared off on the end to cut threads all the way to the bottom of the hole.
By the way, if you don't think you will have enough metal to drill and tap the American thread handle, or cannot find one, Hurst also sells a handle with metric threads where the hole is smaller and for sure there is plenty of metal to just drill and tap the hole without filling.
The threads will be a little long, but remember, the Hurst **** also uses a locknut to align the ****. Even so, you will probably want to cut some of the threads off the stock shifter shaft to make it look right.
By the way, if you don't think you will have enough metal to drill and tap the American thread handle, or cannot find one, Hurst also sells a handle with metric threads where the hole is smaller and for sure there is plenty of metal to just drill and tap the hole without filling.
The threads will be a little long, but remember, the Hurst **** also uses a locknut to align the ****. Even so, you will probably want to cut some of the threads off the stock shifter shaft to make it look right.
Last edited by TEXHAWK0; Apr 21, 2007 at 11:09 AM.
Thread Starter
Melting Slicks
Joined: Jan 2003
Posts: 2,056
Likes: 0
From: monroe city mo
Exactly right. A regular tap is pointed on the end so it is easier to start in an untapped hole. The bottom tap is squared off on the end to cut threads all the way to the bottom of the hole.
By the way, if you don't think you will have enough metal to drill and tap the American thread handle, or cannot find one, Hurst also sells a handle with metric threads where the hole is smaller and for sure there is plenty of metal to just drill and tap the hole without filling.
The threads will be a little long, but remember, the Hurst **** also uses a locknut to align the ****. Even so, you will probably want to cut some of the threads off the stock shifter shaft to make it look right.
By the way, if you don't think you will have enough metal to drill and tap the American thread handle, or cannot find one, Hurst also sells a handle with metric threads where the hole is smaller and for sure there is plenty of metal to just drill and tap the hole without filling.
The threads will be a little long, but remember, the Hurst **** also uses a locknut to align the ****. Even so, you will probably want to cut some of the threads off the stock shifter shaft to make it look right.
