Suzhou Industrial Park Xinkai Precision Fasteners Co., Ltd.

(A2LA Cert. No. 3713.01) 05/28/2025 Page 4 of 4 1 This laboratory does not offer commercial dimensional testing/calibration service. 2 Calibration and Measurement Capability Uncertainty (CMC) is the smallest uncertainty of measurement that a laboratory can achieve within its scope of accreditation when performing more or less routine measurements of nearly ideal measurement standards or nearly ideal measuring equipment. CMCs represent expanded uncertainties expressed at approximately the 95 % level of confidence, usually using a coverage factor of k = 2. The actual measurement uncertainty of a specific measurement performed by the laboratory may be greater than the CMC due to the behavior of the customer’s device and to influences from the circumstances of the specific measurement. 3 This test is not equivalent to that of a calibration.

For the tests to which this accreditation applies, please refer to the laboratory’s Mechanical Scope of Accreditation. Accredited Laboratory A2LA has accredited SUZHOU INDUSTRIAL PARK XINKAI PRECISION FASTENERS CO., LTD. TESTING LAB Shengpu District, Suzhou Industrial Park, China for technical competence in the field of Mechanical Testing This laboratory is accredited in accordance with the recognized International Standard ISO/IEC 17025:2017 General requirements for the competence of testing and calibration laboratories. This accreditation demonstrates technical competence for a defined scope and the operation of a laboratory quality management system (refer to joint ISO-ILAC-IAF Communiqué dated April 2017). Presented this 28th day of May 2025. _______________________ Mr. Trace McInturff, Vice President, Accreditation Services For the Accreditation Council Certificate Number 3713.01 Valid to February 28, 2027