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| ①,Point Types. When unspecified, square head set screws shall be supplied with cup points. Cup points may be knurled (internally or externally) at the manufacturers option. Specifications for cone, dog, half-dog, flat, and oval points are in Table 2.5.1-1. ②,Point Angles. The external point angles specified shall apply only to the portions of the point that lie below the thread root diameter, as angles within the thread profile may vary due to manufacturing processes. ③,Dog Points. When the length of usable (effective) thread is less than the basic screw diameter, dog points shall not be used. Half-dog points shall be used for such screw lengths. ④,Thread Series and Class. The threads on square head set screws shall be Unified Inch coarse, fine, or 8- thread series, Class 2A, in accordance with ASME B1.1. For threads with additive finish, the size limits of Class 2A apply before coating, and the thread after coating is subject to acceptance using a basic Class 3A size GO thread gage and a Class 2A thread gage for either minimum material or NO GO. ⑤,Unless otherwise specified, dimensional acceptability of screw threads shall be determined based on System 21, ASME 81.3. |
![Square Head Set Screws [Table 4] (A307, SAE J429, F468, F593)](https://imgcc.164580.com/upload/48/pic/2025/01/03/1735872166506421414.jpg)
