Description
HHIP 4401-6340 24.8 x 15.7 x 3.15″ Grade A Granite Surface Plate is a premium precision tool designed for high-accuracy measurement, layout, and inspection tasks in metalworking, machining, and quality control. Made from Grade A (Grade 0) granite, this surface plate provides a perfectly flat, durable, and stable reference surface for checking flatness, squareness, parallelism, and perpendicularity of workpieces and instruments.
Features:
- Precision ground top surface with flatness accuracy of ±0.0001″.
- Grade A (Grade 0) granite for superior hardness, stability, and wear resistance.
- Meets or exceeds Federal Specifications GGG-P-463C.
- Certified inspection included (not NIST traceable).
- Non-magnetic and non-conductive surface for safe use with delicate instruments and electronic equipment.
- Durable granite surface resists nicks, burrs, and deformation over time.
- Versatile applications: measuring flatness, setting up tools, calibrating instruments, inspecting parts, and assembling or marking components.
Benefits:
- Provides a reliable and stable reference for precision measurement and inspection tasks.
- Durable granite resists wear and maintains accuracy over time.
- Non-magnetic and non-conductive for safe use with sensitive tools.
- Certified flatness ensures confidence in high-precision setups.
- Ideal for machine shops, quality control labs, and assembly operations requiring exact measurements.
Technical Specifications:
- Model: 4401-6340
- Dimensions: 24.8 x 15.7 x 3.15″
- Grade: A (Grade 0)
- Flatness Accuracy: ±0.0001″
- Material: High-quality granite
- Magnetic Properties: Non-magnetic
- Conductivity: Non-conductive
- Certifications: Inspection certificate included (not NIST traceable)






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