HOW TAP SIZE ARE DESIGNATED
The first number or fraction, represents the diameter of the screw or bolt.The second, the number of threads per inch. (this is the number of revolutions the screw travels in one inch).The letters indicate the thread series in one of these five types:
NC(USS)-National Coarse
NF(SAE)-National Fine
NS-Nationl Special
NPT-National Pipe Tapar
NPS-National Pipe Straight
ISO-INternational Metric
SF-French Metric
DIN-German Metric
PLASTIC HANDY STORAGE BOX
HOW TAP SIZE ARE DESIGNATED
The first number or fraction, represents the diameter of the screw or bolt.The second, the number of threads per inch. (this is the number of revolutions the screw travels in one inch).The letters indicate the thread series in one of these five types:
NC(USS)-National Coarse
NF(SAE)-National Fine
NS-Nationl Special
NPT-National Pipe Tapar
NPS-National Pipe Straight
ISO-INternational Metric
SF-French Metric
DIN-German Metric
PLASTIC HANDY STORAGE BOX
