ISO 17025:2017 - Spence Industries, Inc.

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.

A2LA certificate for Leader Corporation.

A2LA Scope of Accreditation for Leader Corporation.

A table of thread specifications.

A table of parameters and measurements.

A table of dimensional testing and calibration parameters.

A digital micrometer measuring a metal rod.

Precision JO-PLUG® pitch diameters are calibrated using a Pratt & Whitney Super Mic utilizing the universal "three-wire method."

An optical comparator is measuring a part.

Precision JO-PLUG® "lead and trail" thread angles are verified using a J&L Metrology Optical Comparator.