Quanlity Control Sun-Maku Co.,ltd is committed to provide high-quanlity products. All incoming product is subject to inspection in our Quality Assurance lab .We own various testing capabilities such as : - Tensile / Proof Load Testing - Internal / External Thread Gauging - External Electronic Thread Pitch Gauging - Digital Calipers / Micrometers for Dimensional Gauging - Optical Comparator - Plating Thickness Testing - Ductility Testing

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