1 EXHIBIT 6 POWER OF ATTORNEY ----------------- KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of National Sanitary Supply Company hereby constitutes and appoints Edward L. Hutton, Paul C. Voet, Gary H. Sander and Naomi C. Dallob the true and lawful attorneys-in-fact of the undersigned, with full power in each to act without the others, for and in the name of the undersigned as such Director to sign any and all Registration Statements and amendments thereto, including Post-Effective Amendments, filed with the Securities and Exchange Commission relating to registration under the Securities Act of 1933 of interests in or Common Stock of National Sanitary Supply Company to be offered and sold pursuant to its 1997 Stock Incentive Plan. IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal this 22nd day of July, 1997 /s/ Robert B. Garber -------------------------- Robert B. Garber Page 15 E-9 2 POWER OF ATTORNEY ----------------- KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of National Sanitary Supply Company hereby constitutes and appoints Edward L. Hutton, Paul C. Voet, Gary H. Sander and Naomi C. Dallob the true and lawful attorneys-in-fact of the undersigned, with full power in each to act without the others, for and in the name of the undersigned as such Director to sign any and all Registration Statements and amendments thereto, including Post-Effective Amendments, filed with the Securities and Exchange Commission relating to registration under the Securities Act of 1933 of interests in or Common Stock of National Sanitary Supply Company to be offered and sold pursuant to its 1997 Stock Incentive Plan. IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal this 22nd day of July, 1997 /s/ Charles H. Erhart, Jr. -------------------------------- Charles H. Erhart, Jr. Page 16 E-10 3 POWER OF ATTORNEY ----------------- KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of National Sanitary Supply Company hereby constitutes and appoints Edward L. Hutton, Paul C. Voet, Gary H. Sander and Naomi C. Dallob the true and lawful attorneys-in-fact of the undersigned, with full power in each to act without the others, for and in the name of the undersigned as such Director to sign any and all Registration Statements and amendments thereto, including Post-Effective Amendments, filed with the Securities and Exchange Commission relating to registration under the Securities Act of 1933 of interests in or Common Stock of National Sanitary Supply Company to be offered and sold pursuant to its 1997 Stock Incentive Plan. IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal this 17th day of July, 1997 /s/ Neal Gilliatt --------------------------- Neal Gilliatt Page 17 E-11 4 POWER OF ATTORNEY ----------------- KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of National Sanitary Supply Company hereby constitutes and appoints Edward L. Hutton, Paul C. Voet, Gary H. Sander and Naomi C. Dallob the true and lawful attorneys-in-fact of the undersigned, with full power in each to act without the others, for and in the name of the undersigned as such Director to sign any and all Registration Statements and amendments thereto, including Post-Effective Amendments, filed with the Securities and Exchange Commission relating to registration under the Securities Act of 1933 of interests in or Common Stock of National Sanitary Supply Company to be offered and sold pursuant to its 1997 Stock Incentive Plan. IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal this 17th day of July, 1997 /s/ Will J. Hoekman ----------------------------- Will J. Hoekman Page 18 E-12 5 POWER OF ATTORNEY ----------------- KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of National Sanitary Supply Company hereby constitutes and appoints Edward L. Hutton, Paul C. Voet, Gary H. Sander and Naomi C. Dallob the true and lawful attorneys-in-fact of the undersigned, with full power in each to act without the others, for and in the name of the undersigned as such Director to sign any and all Registration Statements and amendments thereto, including Post-Effective Amendments, filed with the Securities and Exchange Commission relating to registration under the Securities Act of 1933 of interests in or Common Stock of National Sanitary Supply Company to be offered and sold pursuant to its 1997 Stock Incentive Plan. IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal this 21st day of July, 1997. /s/ Thomas C. Hutton --------------------------- Thomas C. Hutton Page 19 E-13 6 POWER OF ATTORNEY ----------------- KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of National Sanitary Supply Company hereby constitutes and appoints Edward L. Hutton, Paul C. Voet, Gary H. Sander and Naomi C. Dallob the true and lawful attorneys-in-fact of the undersigned, with full power in each to act without the others, for and in the name of the undersigned as such Director to sign any and all Registration Statements and amendments thereto, including Post-Effective Amendments, filed with the Securities and Exchange Commission relating to registration under the Securities Act of 1933 of interests in or Common Stock of National Sanitary Supply Company to be offered and sold pursuant to its 1997 Stock Incentive Plan. IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal this 18th day of July, 1997 /s/ W. Dwight Jackson -------------------------- W. Dwight Jackson Page 20 E-14 7 POWER OF ATTORNEY ----------------- KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of National Sanitary Supply Company hereby constitutes and appoints Edward L. Hutton, Paul C. Voet, Gary H. Sander and Naomi C. Dallob the true and lawful attorneys-in-fact of the undersigned, with full power in each to act without the others, for and in the name of the undersigned as such Director to sign any and all Registration Statements and amendments thereto, including Post-Effective Amendments, filed with the Securities and Exchange Commission relating to registration under the Securities Act of 1933 of interests in or Common Stock of National Sanitary Supply Company to be offered and sold pursuant to its 1997 Stock Incentive Plan. IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal this 17th day of July, 1997. /s/ Charles O. Lane ------------------------------ Charles O. Lane Page 21 E-15 8 POWER OF ATTORNEY ----------------- KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of National Sanitary Supply Company hereby constitutes and appoints Edward L. Hutton, Paul C. Voet, Gary H. Sander and Naomi C. Dallob the true and lawful attorneys-in-fact of the undersigned, with full power in each to act without the others, for and in the name of the undersigned as such Director to sign any and all Registration Statements and amendments thereto, including Post-Effective Amendments, filed with the Securities and Exchange Commission relating to registration under the Securities Act of 1933 of interests in or Common Stock of National Sanitary Supply Company to be offered and sold pursuant to its 1997 Stock Incentive Plan. IN WITNESS WHEREOF, the undersigned has hereunto set her hand and seal this 16th day of July, 1997. /s/ Sandra E. Laney -------------------------- Sandra E. Laney Page 22 E-16 9 POWER OF ATTORNEY ----------------- KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of National Sanitary Supply Company hereby constitutes and appoints Edward L. Hutton, Paul C. Voet, Gary H. Sander and Naomi C. Dallob the true and lawful attorneys-in-fact of the undersigned, with full power in each to act without the others, for and in the name of the undersigned as such Director to sign any and all Registration Statements and amendments thereto, including Post-Effective Amendments, filed with the Securities and Exchange Commission relating to registration under the Securities Act of 1933 of interests in or Common Stock of National Sanitary Supply Company to be offered and sold pursuant to its 1997 Stock Incentive Plan. IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal this 16th day of July, 1997. /s/ Kevin J. McNamara -------------------------- Kevin J. McNamara Page 23 E-17 10 POWER OF ATTORNEY ----------------- KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of National Sanitary Supply Company hereby constitutes and appoints Edward L. Hutton, Paul C. Voet, Gary H. Sander and Naomi C. Dallob the true and lawful attorneys-in-fact of the undersigned, with full power in each to act without the others, for and in the name of the undersigned as such Director to sign any and all Registration Statements and amendments thereto, including Post-Effective Amendments, filed with the Securities and Exchange Commission relating to registration under the Securities Act of 1933 of interests in or Common Stock of National Sanitary Supply Company to be offered and sold pursuant to its 1997 Stock Incentive Plan. IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal this 21st day of July, 1997. /s/ John M. Mount -------------------------- John M. Mount Page 24 E-18 11 POWER OF ATTORNEY ----------------- KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of National Sanitary Supply Company hereby constitutes and appoints Edward L. Hutton, Paul C. Voet, Gary H. Sander and Naomi C. Dallob the true and lawful attorneys-in-fact of the undersigned, with full power in each to act without the others, for and in the name of the undersigned as such Director to sign any and all Registration Statements and amendments thereto, including Post-Effective Amendments, filed with the Securities and Exchange Commission relating to registration under the Securities Act of 1933 of interests in or Common Stock of National Sanitary Supply Company to be offered and sold pursuant to its 1997 Stock Incentive Plan. IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal this 16th day of July, 1997. /s/ Timothy S. O'Toole ---------------------------- Timothy S. O'Toole Page 25 E-19 12 POWER OF ATTORNEY ----------------- KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of National Sanitary Supply Company hereby constitutes and appoints Edward L. Hutton, Paul C. Voet, Gary H. Sander and Naomi C. Dallob the true and lawful attorneys-in-fact of the undersigned, with full power in each to act without the others, for and in the name of the undersigned as such Director to sign any and all Registration Statements and amendments thereto, including Post-Effective Amendments, filed with the Securities and Exchange Commission relating to registration under the Securities Act of 1933 of interests in or Common Stock of National Sanitary Supply Company to be offered and sold pursuant to its 1997 Stock Incentive Plan. IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal this 17th day of July, 1997. /s/ D. Walter Robbins, Jr. -------------------------- D. Walter Robbins, Jr. Page 26 E-20 13 POWER OF ATTORNEY ----------------- KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of National Sanitary Supply Company hereby constitutes and appoints Edward L. Hutton, Paul C. Voet, Gary H. Sander and Naomi C. Dallob the true and lawful attorneys-in-fact of the undersigned, with full power in each to act without the others, for and in the name of the undersigned as such Director to sign any and all Registration Statements and amendments thereto, including Post-Effective Amendments, filed with the Securities and Exchange Commission relating to registration under the Securities Act of 1933 of interests in or Common Stock of National Sanitary Supply Company to be offered and sold pursuant to its 1997 Stock Incentive Plan. IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal this 21st day of July, 1997. /s/ Kenneth F. Vuylsteke --------------------------- Kenneth F. Vuylsteke Page 27 E-21 14 POWER OF ATTORNEY ----------------- KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of National Sanitary Supply Company hereby constitutes and appoints Edward L. Hutton, Paul C. Voet, Gary H. Sander and Naomi C. Dallob the true and lawful attorneys-in-fact of the undersigned, with full power in each to act without the others, for and in the name of the undersigned as such Director to sign any and all Registration Statements and amendments thereto, including Post-Effective Amendments, filed with the Securities and Exchange Commission relating to registration under the Securities Act of 1933 of interests in or Common Stock of National Sanitary Supply Company to be offered and sold pursuant to its 1997 Stock Incentive Plan. IN WITNESS WHEREOF, the undersigned has hereunto set his hand and seal this 17th day of July, 1997. /s/ George J. Walsh III ----------------------------- George J. Walsh III Page 28 E-22