Go Back  DoItYourself.com Community Forums > Hardware, Tools, Wood & Metal Working, Home & Business Security > Hardware and Fasteners
Reload this Page >

Square bits - S, R & Q? the same or different? And H at the end of a Torx bit?

Square bits - S, R & Q? the same or different? And H at the end of a Torx bit?


  #1  
Old 12-21-23, 08:41 AM
E
Member
Thread Starter
Join Date: Mar 2019
Location: USA
Posts: 288
Received 1 Upvote on 1 Post
Square bits - S, R & Q? the same or different? And H at the end of a Torx bit?

I have some square bits. Some say S followed by a number. Others say R followed by a number. And a couple with Q followed by a number.

The number is the size I figure. But the S vs. R vs. Q? They seem different? Anyone know what the s vs. r vs. Q means?

And some torx bits I have all have an H at the end. These are from a 'security' set of bits from Harbor freight. They have a hole in the center. is that what the H means? Hole?

THANKS!

 
  #2  
Old 12-27-23, 02:55 PM
T
Member
Join Date: Sep 2015
Location: US
Posts: 1,234
Received 209 Upvotes on 183 Posts
R for Robertson.(tapered?)
S for square
T is Torx
P is Phillips
RP may be for Reed-Prince

Amazing number of very similar yet very different drives. No wonder there is confusion.

Not complete, but a good discussion on Wikipedia.
 
CircuitBreaker voted this post useful.
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: