Spence Industries, Inc. is proud to partner with Leader Corporation of Shelby Township, MI as a third party A2LA Accredited Laboratory. Precision JO-PLUG® thread grinding and calibration is performed in accordance with ISO/IEC 17025:2017 general requirements and ANSI/NCSL Z540-1-1994 and R205.

Please Note: To PRINT Certificate ONLY: click on 1st image, then right click choose COPY IMAGE, and you can then paste it in a Word document, go under LAYOUT and choose LANDSCAPE and also choose NARROW MARGINS and size to page. ALL other pages can just be copied, pasted and sized without adjusting margins or orientation.