Drill Size Chart for Number and Letter Gauges
2018-9-9 · Body diameter [inches (mm)] BS1 1⁄8 in (3.175 mm) BS2 3⁄16 in (4.763 mm) BS3 1⁄4 in (6.350 mm) BS4 5⁄16 in (7.938 mm) BS5 7⁄16 in (11.113 mm) BS5A 1⁄2 in (12.700 mm) BS6 5⁄8 in (15.875 mm) BS7 3⁄4 in (19.050 mm) Read hundreds of great mechanical engineering articles at engineeringclicks.com:
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