THREAD AND PLAIN GAUGE TERMINOLOGY
Metric ISO-thread ISO 965
Gauge dimensions ISO1502
BSW and BSF threads BS 84
Gauge dimensions BS919
Cylindrical pipe threads DIN ISO228 Part1
Gauge dimensions DIN ISO 228 Part 2
ISO metric trapezoidal threads DIN 103
Tolerance zones group N (normal)
Gauge dimensions DIN 103 Part 9
Round thread DIN 405-1, 405-2
Tolerance zones group N (normal)
Gauge dimensions DIN 405-3
Unified inch screw threads BS1580
Tolerance zones group N (normal)
Gauge dimensions BS 919
THREADED COMPONENTS
ISO, UN Threads – BS3643, BS1580
Withworth Threads and G- Series BS84, BS2779
Trapezoidal – BS5436
Round Thread – DIN405
Metric Butress
Butress – BS165X
MJ and UNJ Threads BS6293, BS4084
PLAIN DIAMETERS
Gauge Tolerance disposition – Plug Gauges
Gauge Tolerance disposition – Ring Gauges
This diagram shows the relationship between product tolerancing and gauge tolerancing. The practice in the UK is to apply tolerances in accordance with BS969:1982 but we can of course supply to other national and international standards.
