142 Machine Trades Print Reading Copyright Goodheart-Willcox Co., Inc. standard, the spotface symbol was the same as the coun- terbore symbol without the letters SF. A spotface specification is similar to a counterbore specification. See Figure 9‑12. The depth of the spot- face is only given when required. If no depth dimen- sion is given, this indicates that the spotface is to be produced to a minimum depth based on the speci- fied diameter. The specifications for a spotfaced hole appear on two lines. The first line specifies the infor- mation for the small hole in the following order: the diameter symbol, the size of the small hole diameter, the depth symbol, and the depth size (if required). The second line specifies the information for the spotfaced hole in the following order: the spotface symbol, the diameter symbol, the size of the spotface diameter, the depth symbol, and the spotface depth (if required). Means this Spotface symbol This Goodheart-Willcox Publisher Figure 9-12. A spotface is similar to a counterbore, except its depth is shallower than a counterbored hole.