At 03:00 PM 6/27/2010 Sunday, Mike \"Rocket J Squirrel\" wrote:
>I was wondering how to interpret "B4,8x38" -- so, what is that -- 4.8mm
>(3/16'') diameter and, uh, 38 TPI? The "B" ... ?

38 mm long would be 1 and .992125984/2 inches long.

Type B has a 60ddeg flank angle thread and can form a thread in soft
materials. The end of the screw is blunt, offering more thread
engagement in short length applications.

Type AB is likewise but has a sharp point.

Type 25 has a blunt point with a thread-tapping slot cut in the end.

Type TEK2 adds a drill point so it can drill its own holes.

Yr Servant,
d