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BS 328-5:1983 Drills and reamers. Specification for the dimensions of countersinks and counterbores
standard by BSI Group, 07/29/1983
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Full Description
Specifies the dimensions of counterbores with parallel shanks and integral pilots; counterbores with Morse taper shanks and detachable pilots; countersinks with parallel shanks, and countersinks with Morse taper shanks. Appendix A shows extracts from BS 4500:Part 1 giving details of the tolerances specified and Appendix B gives details of counterbores with cutting diameters designated in inches.Cross References:
BS 328:Part 1
BS 328:Part 2
BS 328:Part 3
BS 328:Part 4
BS 1660
BS 1916:Part 1
BS 4500:Part 1