Mitutoyo 157-901 Optical Parallels, 0.5-0.5187 Inch

The Mitutoyo 157-901 is a precision optical parallel set designed for inspecting the parallelism and flatness of measuring faces on micrometers and other precision instruments. This professional-grade metrology tool ensures accurate calibration and verification of measuring equipment in quality control and inspection applications.

Set Includes Four Precision Optical Parallels:

• 0.5000 inch parallel (157-109)
• 0.5062 inch parallel (157-110)
• 0.5125 inch parallel (157-111)
• 0.5187 inch parallel (157-112)

Key Features:

• Precision ground and lapped surfaces for superior flatness and parallelism
• Four graduated thicknesses allow verification across measurement range
• Supplied in fitted wooden storage case for protection and organization
• Ideal for calibrating micrometers, height gages, and other precision measuring instruments
• Manufactured to Mitutoyo's strict quality standards

These optical parallels are essential tools for metrology labs, quality control departments, and precision manufacturing environments where maintaining measurement accuracy is critical. The hardened steel construction ensures long-term dimensional stability and durability.