Home › Forum › Ask A Member › 17/64" bolt size? › Re: 17/64" bolt size?
November 22, 2017 at 1:30 am
#67779
The unusual size screws that we sometimes encounter are due to the old American Standard screw size system where a wide range of sizes were represented by "number"sizes . Common Examples are #12-24 (.216 Dia… used on Johnson rope plate screws); #14-20 (.242 dia … easily confused with the common 1/4 – 20) ; #16-20 (.268 dia); #18-20 (.294), also be aware that these screw diameters may have been made in various pitches like 18, 20, 24 tpi.
Joe B