[Boatanchors] KWM-2 help?

WA5CAB at cs.com WA5CAB at cs.com
Wed Apr 19 21:42:22 EDT 2006


And further to that, there are very obvious differences between Bristol and 
Torx drivers and headed fasteners.  Torx (which came out several decades after 
the KWM-2) has approximately triangular splines.  Bristol has rectangular 
ones, although the four-flute screws and drivers may have slightly rounded corners 
at the minor diameter, due to the very small size of the four-flute units.  
Also, with Bristol, there is a discernable gap between the splines at the minor 
diameter.  With Torx there isn't.

Also, although I haven't bought a new edition of Machinery's Handbook in 
several years and Torx isn't mentioned in the 21st Edition, the smallest Torx 
driver that I have or have ever seen is a T10, which is 6-flute.

In a message dated 4/19/2006 7:53:21 PM Central Daylight Time, 
glennmaillist at bellsouth.net writes: 
> The tool that you are looking for is a Bristol spline drive wrench. They 
> come in 4 and 6 flutes.
> 
> Alan Bond of Max-Gain Systems 
> <http://www.mgs4u.com/bristol-wrench-spline.htm> can provide you with the 
> tool.
> 

Robert Downs - Houston
<http://www.wa5cab.com> (Web Store)
MVPA 9480
<wa5cab at cs.com> (Primary email)
<wa5cab at houston.rr.com> (Backup email)


More information about the Boatanchors mailing list