EXHIBIT 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Lawson Products, Inc.

Chicago, Illinois

We hereby consent to the incorporation by reference in the Registration Statements on Forms S-3 (No. 333-202169) and Form S-8 (No. 333-199243) of Lawson Products, Inc. of our reports dated March 4, 2019, relating to the consolidated financial statements and financial statement schedule, and the effectiveness of Lawson Products, Inc.’s internal control over financial reporting, which appear in this Form 10-K.

/s/ BDO USA, LLP

Chicago, Illinois

March 4, 2019