The Unior 52 thread gauge is used to identify the external and internal diameters of metric and Whitworth threads. It is made of stainless steel and includes 24 gauges for metric threads and 28 for Whitworth threads.
- Material: Stainless steel
- Metric threads: 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.60, 0.70, 0.75, 0.80, 0.90, 1.0, 1.25, 1.50, 1.75, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0
- Whitworth threads: 4, 4.5, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 18, 19, 20, 22, 24, 25, 26, 28, 30, 32, 36, 40, 48, 60, 62
- Certificate: Certificate of conformity