BS 8498:2008

BS 8498:2008 is an 'umbrella standard' for screw threads and screw guages.

BS 8498 gives a general introduction to the series of British Standards specifying single start parallel screw threads, the corresponding screw gauges with which they are to be used, and the relevant standard specifying the gauge blanks.

BS 8498 gives a general introduction to:

• Parallel screw threads of Whitworth form BS 84
• British Association (B.A.) screw threads BS 93
• Unified screw threads BS 1580-1 and BS 1580-3
• ISO metric screw threads BS 3643-1
• Screw gauge limits and tolerances BS 919-1, BS 919-2, BS 919-3 and BS 919-4
• Specification for gauge blanks BS 1044-1