EXHIBIT 32.1

                            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 of HEI, Inc. (the "Company") on Form
10-Q for the quarter ended November 29, 2003, as filed with the Securities and
Exchange Commission on the date hereof (the "Report"), I, Mack V. Traynor, Chief
Executive Officer and President of the Company, certify, pursuant to 18 U.S.C.
Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley AcT of
2002, that to the best of my knowledge:

         (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 the
Company.

                                      /s/ Mack V. Traynor, III
                                      ---------------------------------
                                      Mack V. Traynor, III
                                      Chief Executive Officer and President

Date: January 13, 2004

A signed original of this written statement required by Section 906 has been
provided to HEI, Inc. and will be retained by HEI, Inc. and furnished to the
Securities and Exchange Commission or its staff upon request.