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                                                                     EXHIBIT 5.1




                  [Morris, Nichols, Arsht & Tunnell Letterhead]




                               November 2, 1998




Muldoon, Murphy & Faucette
5101 Wisconsin Avenue, N.W.
Washington, DC  20016

Ladies and Gentlemen:

            You have requested our opinion concerning certain matters of
Delaware law in connection with the conversion of Security Savings
Association of Hazelton, a state chartered savings association (the
"Association"), from the mutual form of ownership to stock form of ownership
(the "Conversion") and the subscription and community offering (the
"Offering"), in connection with the Conversion, by Security of Pennsylvania
Financial Corp., a Delaware corporation (the "Company"), of up to 1,511,617 
shares of its common stock, par value $.01 per share (the "Common Stock").

            In connection with your request for our opinion, you have provided
to us, and we have reviewed, the Company's certificate of incorporation (the
"Certificate of Incorporation"), its bylaws, the Registration Statement filed
with the Securities and Exchange Commission in connection with the Offering (the
"Registration Statement"), including the prospectus constituting a part thereof
(the "Prospectus"), a consent of the sole incorporator of the Company,
resolutions of the Board of Directors of the Company (the "Board") concerning,
inter alia, the organization of the

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Company, the Offering and the designation of a Pricing Committee of the Board
(the "Pricing Committee"), the form of stock certificate approved by the Board
to represent shares of Common Stock. We have also obtained a certificate of the
Delaware Secretary of State as to the Company's good standing as a Delaware
corporation. Capitalized terms used but not defined herein shall have the
meanings given them in the Certificate of Incorporation.

            We understand that the Company will loan to the Association's
Employee Stock Ownership Plan (the "ESOP") the funds the ESOP will use to
purchase the shares of Common Stock for which the ESOP has subscribed as part of
the Offering. In this regard, we have assumed, for purposes of rendering the
opinion set forth in paragraph 2 below, that: (a) the Board has duly authorized
the loan to the ESOP (the "Loan"); (b) the Loan serves a valid corporate
purpose; (c) the Loan will be made at an interest rate and on other terms that
are fair to the Company; (d) the terms of the Loan will be set forth in
customary and appropriate documents including, without limitation, a promissory
note representing the indebtedness of the ESOP to the Company as a result of the
Loan; and (e) the closing for the Loan and for the sale of Common Stock to the
ESOP will be held after the closing for the sale of the other shares of Common
Stock sold in the Offering and the receipt by the Company of the proceeds
thereof.

            We call your attention to the fact that the opinions expressed
herein are limited in all respects to matters of Delaware corporate law. We
express no opinion concerning the requirements of any other law, rule or
regulation, state or federal, applicable to the Association, the Company, the
Offering or the Conversion, including, without limitation, those applicable to 
state chartered, federally insured savings associations or their holding 
companies.

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            Based upon and subject to the foregoing, it is our opinion that:

            1. The Company has been duly organized and is validly existing in
good standing as a corporation under the laws of the State of Delaware, with the
corporate power and authority to own its property and conduct its business as
now conducted as described in the Prospectus.

            2. Upon the due adoption by the Pricing Committee of a resolution
fixing the number of shares of Common Stock to be sold in the Offering, the
Common Stock to be issued in the Offering (including the shares to be issued to
the ESOP) will be duly authorized and, when such shares are sold and paid for in
accordance with the terms set forth in the Prospectus and such resolution of the
Pricing Committee, and certificates representing such shares in the form
provided to us are duly and properly issued, will be validly issued, fully paid
and non-assessable, with no personal liability for the payment of the Company's
debts arising solely by virtue of the ownership thereof; such issuance and sale
will not be in violation of or subject to any preemptive rights provided for by
Delaware law or by the Certificate of Incorporation.

            The following provisions of the Certificate of Incorporation may not
be given effect by a court applying Delaware law, but in our opinion the failure
to give effect to such provisions will not affect the duly authorized, validly
issued, fully paid and non-assessable status of the Common Stock:

            (a)     Subsections C.3 and C.6 of Article FOURTH and Section D of
Article EIGHTH, which grant the Board the authority to construe and apply the
provisions of those Articles, subsection C.4 of Article FOURTH, to the extent
that provision obligates any person to provide to the Board the information such
subsection authorizes the Board to demand, and the provision of Section C.7 of
Article EIGHTH empowering the Board to determine the Fair Market Value of



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property offered or paid for the Company's stock by an Interested Stockholder,
to the extent, if any, that a court applying Delaware law were to impose
equitable limitations upon the authority of the Board under such provisions.

            (b)     Article NINTH of the Certificate of Incorporation, which
purports to permit the Board to consider the effect of any offer to acquire the
Company on constituencies other than stockholders in evaluating any such offer.


                                        Very truly yours,

    
                                        /s/ MORRIS, NICHOLS, ARSHT & TUNNELL