FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * HENNON CHARLES W   2. Issuer Name and Ticker or Trading Symbol LAMSON & SESSIONS CO [LMS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Vice Pres. & CIO (Last) (First) (Middle) THE LAMSON & SESSIONS CO., 25701 SCIENCE PARK DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 05/31/2005 (Street) CLEVELAND, OH 44122 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price COMMON STOCK 05/31/2005   M   5,000 A $ 7.156 14,087 D (1)   COMMON STOCK 05/31/2005   M   12,000 A $ 4.968 26,087 D (1)   COMMON STOCK 05/31/2005   M   20,000 A $ 6.625 46,087 D (1)   COMMON STOCK 05/31/2005   S   37,000 D $ 11 9,087 D (1)   COMMON STOCK               8,243 I See Footnote (2) COMMON STOCK               5,299 I See Footnote (3)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Stock Option (Right to Buy Common Stock)

$ 7.156

05/31/2005

M

5,000

04/20/1998(4)

04/20/2008

Common Stock

5,000

$ 0

0

D

Stock Option (Right to Buy Common Stock)

$ 4.968

05/31/2005

M

12,000

02/25/1999(5)

02/25/2009

Common Stock

12,000

$ 0

0

D

Stock Option (Right to Buy Common Stock)

$ 6.625

05/31/2005

M

20,000

02/23/2000(6)

02/23/2010

Common Stock

20,000

$ 0

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
HENNON CHARLES W THE LAMSON & SESSIONS CO. 25701 SCIENCE PARK DRIVE CLEVELAND, OH 44122			Vice Pres. & CIO

Signatures

/s/ Aileen Liebertz Aileen Liebertz, Attorney-in-Fact for Charles W. Hennon		06/02/2005
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Total includes shares distributed to Reporting Person from the Trust under The Lamson & Sessions Co. Deferred Compensation Plan for Executive Officers (the "Trust") as of February 23, 2005. Total also includes 815 restricted shares, exempt under Rule 16b-3(d)(1), held by issuer until 3-year vesting period, on February 18, 2006 and February 17, 2008 of 581 and 234 common shares, respectively.
(2)	Held in Trust pursuant to the Deferred Compensation Plan for Executive Officers - a 16b-3 Plan as of March 11, 2005.
(3)	Held under The Lamson & Sessions Co. Deferred Savings Plan (the "401(k) Plan"), exempt under Rule 16b-3(c). Total adjusted to reflect ongoing acquisitions under the 401(k) Plan since Reporting Person's last report.
(4)	Exercisable 50% after one year from April 20, 1998, the grant date, remaining 50% exercisable after two years from grant date.
(5)	Exercisable over three years as follows: one-third on February 25, 2000; one-third on February 25, 2001; and one-third on February 25, 2002, with number of shares vested in each year rounded to the nearest whole share.
(6)	Exercisable over three years as follows: one-third on February 23, 2001; one-third on February 23, 2002; and one-third on February 23, 2003, with number of shares vested in each year rounded to the nearest whole share.

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