Roughness Standards

61-026-1 SPI Roughness Standards

The SPI 61-026-1 Roughness Standards have the following features:

• Helps avoid costly under or over-finishing
• Pocket-size gage has 22 precision surfaces for comparing surface finishes
• Includes lapped, ground, turned and milled specimens, ranging from 2 to 500 microinches
• Made to ASA standard B46 2.1955
• Dimensions, 5" x 2" with plastic pouch