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                                                        SEC FILE NUMBER

                                                            0-13470
                                                 ===============================
                                                         CUSIP NUMBER

                                                           630077105
                                                 -------------------------------


                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  FORM 12b-25

                          NOTIFICATION OF LATE FILING

(Check one): [ ] Form 10-K   [ ] Form 20-F    [X] Form 10-Q
             [ ] Form N-SAR  [ ] Form N-CSR

For Period Ended:      July 3, 2004

[ ] Transition Report on Form 10-K
[ ] Transition Report on Form 20-F
[ ] Transition Report on Form 11-K
[ ] Transition Report on Form 10-Q
[ ] Transition Report on Form N-SAR
For the Transition Period Ended: _______________________________________________

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Nothing  in this  form  shall be  construed  to imply  that the  Commission  has
verified any information  contained  herein.
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If the notification  relates to a portion of the filing checked above,  identify
the Item(s) to which the notification relates:
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PART I -- REGISTRANT INFORMATION

                            Nanometrics Incorporated
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Full Name of Registrant

                                      N/A
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Former Name if Applicable

                               1550 Buckeye Drive
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Address of Principal Executive Office (Street and Number)

                           Milpitas, California 95035
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City, State and Zip Code

PART II -- RULES 12b-25(b) AND (c)

If the subject report could not be filed without  unreasonable effort or expense
and the registrant seeks relief pursuant to Rule 12b-25(b), the following should
be completed. (Check box if appropriate)


[X]  (a) The  reason  described  in  reasonable  detail in Part III of this form
         could not be eliminated without unreasonable effort or expense

[X]  (b) The subject annual report,  semi-annual  report,  transition  report on
         Form 10-K,  Form 20-F,  Form 11-K, Form N-SAR or Form N-CSR, or portion
         thereof,  will  be  filed  on or  before  the  fifteenth  calendar  day
         following the prescribed due date; or the subject  quarterly  report or
         transition report on Form 10-Q, or portion thereof, will be filed on or
         before the fifth calendar day following the prescribed due date; and

[ ]  (c) The accountant's  statement or other exhibit required by Rule 12b-25(c)
         has been attached if applicable.

PART III -- NARRATIVE

State below in reasonable detail why Forms 10-K, 20-F, 11-K, 10-Q, N-SAR, N-CSR,
or the  transition  report or  portion  thereof,  could not be filed  within the
prescribed time period.

(Attach extra Sheets if Needed)



On June 18,  2004,  Deloitte  & Touche  LLP  ("Deloitte")  notified  Nanometrics
Incorporated   (the  "Company")  of  its  intent  to  resign  as  the  Company's
independent   registered  public  accounting  firm  effective  immediately  upon
completion  of  Deloitte's   review  of  the   Company's   unaudited   condensed
consolidated  interim financial  statements to be included in the Company's Form
10-Q for the quarter ended July 3, 2004.

In  connection  with the  Company's  transition to a new  accounting  firm,  the
Company is in the process of  finalizing,  with the  assistance  of  third party
consultants,  certain supporting calculations underlying the Company's financial
statements. This process cannot be completed within the prescribed period.

The Company  expects to file its Form 10-Q on or before the fifth  calendar  day
following the prescribed due date.

PART IV -- OTHER INFORMATION

(1)  Name  and  telephone  number  of  person  to  contact  in  regard  to  this
     notification

          Paul B. Nolan                 408                   435-9600
----------------------------------- ------------- ------------------------------
              (Name)                 (Area Code)         (Telephone Number)

(2)  Have all other periodic  reports  required under Section 13 or 15(d) of the
     Securities Exchange Act of 1934 or Section 30 of the Investment Company Act
     of 1940 during the preceding 12 months or for such shorter  period that the
     registrant  was required to file such  report(s)  been filed ? If answer is
     no, identify report(s).                                    Yes [X]  No [ ]

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(3)  Is it anticipated that any significant change in results of operations from
     the corresponding  period for the last fiscal year will be reflected by the
     earnings statements to be included in the subject report or portion thereof
                                                               Yes [ ]  No [X]

     If so, attach an explanation of the anticipated  change,  both  narratively
     and quantitatively, and, if appropriate, state the reasons why a reasonable
     estimate of the results cannot be made.

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                            Nanometrics Incorporated
                  --------------------------------------------
                  (Name of Registrant as Specified in Charter)

has  caused  this  notification  to be signed on its  behalf by the  undersigned
hereunto duly authorized.

Date      August 17, 2004                  By   /s/ Paul B. Nolan
     ----------------------------------       ----------------------------------

INSTRUCTION: The form may be signed by an executive officer of the registrant or
by any other duly  authorized  representative.  The name and title of the person
signing  the form  shall  be typed or  printed  beneath  the  signature.  If the
statement is signed on behalf of the registrant by an authorized  representative
(other than an executive officer), evidence of the representative's authority to
sign on behalf of the registrant shall be filed with the form.


---------------------------------- ATTENTION -----------------------------------
Intentional  misstatements  or omissions  of fact  constitute  Federal  Criminal
Violations (See 18 U.S.C. 1001).
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