SK Steel Block Gauge, Class 1 equivalent, 3.50 mm, GB1-350, 1 piece

Catalogue number: GB1-350 Features: ●Inspection sheet with inspection values ​​is included to guarantee accuracy. ●Anti-rust sheet is included for easy maintenance. ●Equivalent to Class 1. Applications: ●Standard gauge for accuracy inspection and comparative measurement of calipers, micrometers, dial gauges, etc. Specifications: ●Cross-sectional dimensions (mm): 30{0-(-0.3)}x9{(-0.05)-(-0.2)} ●Thermal expansion coefficient: 11.5x10-6 power/K ●Dimensional tolerance (μm): ±0.20 (0.16 difference) Material/Finish: ●Body: High carbon high chromium steel