Barnes (B) 8-K/A Consolidated Financial Statements

Exhibit 23.1

KPMG LLP

One Financial Plaza

755 Main Street

Hartford, CT 06103

Consent of Independent Auditors

We consent to the incorporation by reference in the registration statements (Nos. 333-133597, 333-150741, 333-205952, 333-271743 and 333-266134) on Form S-8 of Barnes Group Inc. of our report dated October 16, 2023, with respect to the consolidated financial statements of MB Aerospace Holdings Inc., which report appears in the Form 8-K/A of Barnes Group Inc. dated November 15, 2023.

/s/ KPMG LLP

Hartford, Connecticut

November 15, 2023