Niigata Seiki SK block gauge 1st class equivalent item bulk item 3.10mm GB1-310

Used as a reference gauge for general measurements and work, as well as space blocks and high value-added parts. Material: High carbon high chromium steel Specifications: Cross-sectional dimensions: 10mm or less...30(0~-0.3)×9(-0.05~-0.2)mm Over 10mm...35(0~-0.3)×9(-0.05~-0.2)mm・Coefficient of thermal expansion: 11.5×10-6/K Standard: 3.10mm