NOTE
The Rs-series per BS 21 is an obsolete thread series and should not be used in new designs; however; you may find a requirement for Rs-series screw threads on an older product/part design drawing. Similarities The G-series and the Rs-series British Standard Screw Threads have much in common: a. Both are British Standard Pipe Parallel. b. Both have the Whitworth 55° included thread angle form with Full Form rounded root and crest of thread. c. In all situations the G-series can be used when the Rs-series is specified, but the reverse is not true.
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AuthorWith unceasing appetite for knowledge - Karthik Kumarasamy Archives
August 2015
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