Specimen of Common Stock certificates.



 Exhibit 4.1 
 BOLT 
  

			
	NUMBER	 	SHARES
		
	N                             	 	

 COMMON STOCK     BOLT TECHNOLOGY CORPORATION     COMMON
STOCK 
 INCORPORATED UNDER THE LAWS OF THE STATE OF CONNECTICUT 
 CUSIP 097698 10 4 
 SEE REVERSE FOR CERTAIN DEFINITIONS 
 THIS IS TO CERTIFY that 
 SPECIMEN

 is the owner of 
 FULLY PAID AND NON-ASSESSABLE SHARES
WITHOUT PAR VALUE OF THE COMMON STOCK, OF 
 BOLT TECHNOLOGY CORPORATION transferable on the books of the Corporation by the holder hereof in person or by
duly authorized attorney, upon surrender of this certificate properly endorsed. 
 This certificate is not valid unless countersigned and
registered by the Transfer Agent and Registrar. 
 (SEAL of BOLT)     WITNESS the seal and the signatures of its duly authorized officers.

 Dated: 
  

							
		 	 /s/
	 		 	 /s/

		 	Treasurer	 		 	President








 BOLT TECHNOLOGY CORPORATION 
 The Corporation will furnish without charge to each stockholder who so requests the powers, designations, preferences and relative, participating, optional or other special rights of each class of stock or series
thereof of the Corporation and the qualifications, limitations, or restrictions of such preferences and/or rights. Such request may be made to the Corporation or the Transfer Agent. 
 The following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations: 
  

							
	TEN COM -	  	 as tenants in common 
 as tenants by the
entireties
 as joint tenants with right of survivorship and not as tenants in common
	  	UNIF GIFT MIN ACT-                    	  	Custodian                     
	TEN ENT -	  	  	                                       
      (Cust)	  	                  (Minor)
	JT TEN -	  	  	under Uniform Gifts to Minors
		  	  	  Act
                                       
 

		  	  	    (State)

 Additional abbreviations may also be used though not in the above list. 
 For value received,
                         hereby sell, assign and transfer unto 
 PLEASE INSERT SOCIAL SECURITY OR OTHER 
     IDENTIFYING
NUMBER OF ASSIGNEE 
  

			
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	[	  	]                                      
                                        
              

  
 ____________________________________________________________________________________________________________________________________________________________ 
 Please print or typewrite name and address including postal zip code of assignee 
  
 ____________________________________________________________________________________________________________________________________________________________ 
  

____________________________________________________________________________________________________________________________________________________________

  
                                       
                                        
                                        
                                        
                                   Shares 
  
 of the capital stock represented by the within Certificate, and do
hereby irrevocably constitute and appoint
                                        
     
  
 ____________________________________________________________________________________________________________________________________________________________ 
 Attorney to transfer the said stock on the books of the within-named Corporation with full power of substitution in the premises.

  

	
	 Dated,
                    


 NOTICE: The signature to this assignment must correspond with the name as written upon the face of the
Certificate, in every particular, without alteration or enlargement, or any change whatever.