UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): November 8, 2011

Commission File Number 1-9929

Insteel Industries, Inc.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (336) 786-2141

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

On November 8, 2011, Insteel Industries, Inc. (the “Company”) issued a press release announcing that its board of directors had declared a quarterly cash dividend of $0.03 per share payable on December 30, 2011 to shareholders of record as of December 14, 2011. A copy of this release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

While the Company intends to pay regular quarterly cash dividends for the foreseeable future, the declaration and payment of future dividends, if any, are discretionary and will be subject to determination by the board of directors each quarter after taking into account various factors, including general business conditions and the Company’s financial condition, operating results, cash requirements and expansion plans.

Cautionary Note Regarding Forward-Looking Statements

This report contains forward-looking statements within the meaning of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995 with respect to the Company’s intent and ability to pay future dividends. Although the Company believes that its plans, intentions and expectations reflected in or suggested by such forward-looking statements are reasonable, such forward-looking statements are subject to a number of risks and uncertainties, and the Company can provide no assurances that such plans, intentions or expectations will be implemented or achieved. Many of these risks and uncertainties are discussed in detail in the Company’s reports and statements that it files with the U.S. Securities and Exchange Commission, in particular in its Annual Report on Form 10-K for the year ended October 2, 2010. You should carefully review these risks and uncertainties.

All forward-looking statements attributable to the Company or persons acting on its behalf are expressly qualified in their entirety by these cautionary statements. All forward-looking statements speak only to the respective dates on which such statements are made and the Company does not undertake and specifically declines any obligation to publicly release the results of any revisions to these forward-looking statements that may be made to reflect any future events or circumstances after the date of such statements or to reflect the occurrence of anticipated or unanticipated events, except as may be required by law.

(d) Exhibits

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

EXHIBIT INDEX