Exhibit 32
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
In connection with the Quarterly Report on Form 10-Q of W.W. Grainger, Inc. (“Grainger”) for the quarterly period ended June 30, 2014, (the “Report”), J. T. Ryan, as Chairman, President and Chief Executive Officer of Grainger, and R. L. Jadin, as Senior Vice President and Chief Financial Officer of Grainger, each hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:
| 1. | The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and |
| 2. | The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Grainger. |
| /s/ J. T. Ryan |
| J. T. Ryan |
| Chairman, President and Chief Executive Officer |
| July 31, 2014 |
| /s/ R. L. Jadin |
| R. L. Jadin |
| Senior Vice President and Chief Financial Officer |
| July 31, 2014 |