St. Louis Screw & Bolt

A2LA Cert. No. (0696.01) 07/15/2024 Page 2 of 2 _________________________________ 1 This laboratory does not offer commercial dimensional testing services. 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 . CMC’s 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 ST. LOUIS SCREW & BOLT Madison, IL 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 15th day of July 2024. _______________________ Mr. Trace McInturff, Vice President, Accreditation Services For the Accreditation Council Certificate Number 0696.01 Valid to May 31, 2026