A. M. Castle & Co.

JERRY M. AUFOX

Corporate Counsel & Secretary

              June 9, 2005

VIA FACSIMILE - 202-772-9220

Ms. Jill Davis, Branch Chief

Securities and Exchange Commission

Washington, D.C. 20549-0405

Re: A. M. Castle & Co.

Form 10-K for Fiscal Year Ended December 31, 2004

Filed March 16, 2005

File No. 1-5415

Dear Ms. Davis:

I am responding pursuant to our telephone conversation of today in connection with your letter of June 9^th addressed to Mr. Lawrence A. Boik, our CFO. As I related to you, Mr. Boik is out of the country on vacation and Castle wishes to respond appropriately and fully to the SEC’s comments contained in your letter. In order to do so, we need Mr. Boik, as well as the input from our registered independent auditor, Deloitte & Touche, LLP.

We, therefore, request an extension to file our response to July 25, 2005.

I appreciate your understanding.

             

                                                        
JMA:clc

cc:  Tom McKane

Larry Boik

Hank Veith

3400 N. Wolf Road, Franklin Park, Illinois 60131

(847) 349-2516     Fax (847) 455-7136

E-mail: jaufox@amcastle.com