Grade A Granite Surface Plate 400 By 400 By 60 mm With Precision Ground Flatness Plus Or Minus 0.0001 Inch Meets GGG P 463C Standards Includes Inspection Certificate A Solid Pick For Precision Measuring And Machining

Grade A Granite Surface Plate 400x400x60 mm, precise flat
✔️ Pack: single plate, flatness ±0.0001 in, 400x400x60 mm

This Grade A (Grade 0) granite surface plate delivers a stable, flat reference plane ideal for precision measuring, layout, inspection, and tool setup in machining and metrology. The top surface is precision ground to achieve flatness within ±0.0001 inch. It includes an inspection certificate and complies with GGG-P-463C standards, though it is not NIST traceable.

✅ Flatness: ±0.0001 in (±0.00254 mm) across the top surface
✅ Size: 400 by 400 by 60 mm (15.75 by 15.75 by 2.36 in)
✅ Grade A (Grade 0) granite plate for precision work
✅ Non-magnetic and non-conductive; resists nicks and burrs
✅ Includes inspection certificate; meets GGG-P-463C (not NIST traceable)

💡 What is a granite surface plate commonly used for? A handy, reliable reference plane for precision measuring, layout, and inspection in shop and lab settings.

- Use as a stable base for height gauging and metrology checks - Check straightness and squareness during setup - Provide a durable work surface for assembling and marking parts - Great for sensitive components due to non-magnetic surface