[GreenKeys] Friden SFD-V

[Richard Knoppow]

    Look with a magnifying glass. Allen head screws have hexagonal flat 
sides, Bristol screws have either six or four sort of star shaped 
grooves. There are some other types of heads but they are rare.  See the 
following for good illustrations of various drive styles.

https://en.wikipedia.org/wiki/List_of_screw_drives

On 1/18/2017 4:35 PM, Cory Heisterkamp wrote:
> Are you sure it's not a Bristol key? The Model FL Flexowriter I am
> working on (and I do mean that literally...I'm recoding the keyboard
> slides at this very moment) is full of 'em. -Cory

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL