Exhibit 15 October 15, 2004 Board of Directors Lawson Products, Inc. We are aware of the incorporation by reference in the Registration Statement (Form S-8 No. 33-17912 dated November 4, 1987) of Lawson Products, Inc. of our report dated October 15, 2004 relating to the unaudited condensed consolidated interim financial statements of Lawson Products, Inc. which are included in its Form 10-Q for the quarter ended September 30, 2004. Pursuant to Rule 436(c) of the Securities Act of 1933 our report is not part of the registration statement prepared or certified by accountants within the meaning of Section 7 or 11 of the Securities Act of 1933. /s/ ERNST & YOUNG LLP Chicago, Illinois