{"product_id":"grade-a-granite-surface-plate-400-by-400-by-60-mm","title":"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","description":"\u003cdiv\u003eGrade A Granite Surface Plate 400x400x60 mm, precise flat\u003cbr\u003e\n✔️ Pack: single plate, flatness ±0.0001 in, 400x400x60 mm \u003cp\u003eThis 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.\u003c\/p\u003e ✅ Flatness: ±0.0001 in (±0.00254 mm) across the top surface\u003cbr\u003e\n✅ Size: 400 by 400 by 60 mm (15.75 by 15.75 by 2.36 in)\u003cbr\u003e\n✅ Grade A (Grade 0) granite plate for precision work\u003cbr\u003e\n✅ Non-magnetic and non-conductive; resists nicks and burrs\u003cbr\u003e\n✅ Includes inspection certificate; meets GGG-P-463C (not NIST traceable)\u003cbr\u003e \u003cp\u003e💡 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.\u003c\/p\u003e\n- Use as a stable base for height gauging and metrology checks\n- Check straightness and squareness during setup\n- Provide a durable work surface for assembling and marking parts\n- Great for sensitive components due to non-magnetic surface \u003c\/div\u003e","brand":"Amazon","offers":[{"title":"Default Title","offer_id":48160480100587,"sku":"VXB0CXKCPRR9","price":334.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/61nAYrO3NrL_4985691e-f6d8-413e-a039-51f6cf85aa5c.jpg?v=1777467729","url":"https:\/\/vxb.com\/products\/grade-a-granite-surface-plate-400-by-400-by-60-mm","provider":"VXB Bearings","version":"1.0","type":"link"}