Thread data BSW, BSF, BSP 55°; BA Tread Form - Angle of thread = 47. 5 degrees, rounded at top and bottom BA
![BS 450 - 1958Slotted Round Head Screws with B.S.W. & B.S.F. Threads [Table 4]](https://img.164580.com/upload/48/standard/2020/07/31/1596174569328290839m.jpg "BS 450 - 1958Slotted Round Head Screws with B.S.W. & B.S.F. Threads [Table 4]")
BS 450 - 1958Slotted Round Head Screws with B.S.W. & B.S.F. Threads [Table 4]
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Thread data BSW, BSF, BSP 55°; BA Tread Form - Angle of thread = 47. 5 degrees, rounded at top and bottom BA
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