What kind of screw head
I was going to remove the side lights on our Rockwood 5th wheel to clean the metal ring of rust and repaint. However I quickly discovered these are not standard Torx head screws. A T20 is too large an...
Forum Discussion
camperpaul wrote:ktmrfs wrote:camperpaul wrote:
FWIW it is really a Bristol head screw, commonly used in aircraft.
bristol heads I've seen are a 6 point spline drive with a wedged taper so that it's virtually impossible to cam out. extremely good design, probably the most immune to damage of anything I've seen.
While this is an 8 point not really spline drive, certainly not the wedge taper.
Back in the '60s when I was in the avionics business, I had a complete set of "Hunter" Bristol wrenches.
The set included 4, 5, 6, 7 and 8 point wrenches.
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Another area of confusion is "cross point" screw drivers.
A lot of people don't know the subtle difference between a
"Phillips" and a "Reed and Prince".
I found out that the phillips head was initially designed to purposely "cam out" to keep production workers with automatic drivers from over tightening or breaking screws.
then along came Reed and Prince and Pozidrive designed to be much harder to "cam out" under use.
And yes, your right, few folks know the difference between the cross point drives and fewer yet can identify which is which.
