| 
                            
                                |  |  
                                |   |  
		                        | National Stock Number:
 5305-01-255-1837
 
 Federal Supply Class:
 5305
 
 National Item Identification Number:
 012551837
 
 Description:
 SCREW,CAP,SOCKET HEAD
 
 Detail:
 An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See BOLT, INTERNAL WRENCHING. Excludes SCREW, SHOULDER; and SCREW, MACHINE.
 |  
		                        | 
 Manufacturer Information:
 
 | 2285-304 PIECE 20 | 43689 | HUNTINGTON INGALLS INC |  | 2285-304 PIECE 20L1 | 03950 | NAVAL INVENTORY CONTROL POINT MECHANICSBURG |  | GR500TYV11/2-13UNC-3AX11/2 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M | 
 |  
					            | 
 Techincal Specification:
 
 | NOMINAL THREAD DIAMETER | 0.500 INCHES |  | THREAD QUANTITY PER INCH | 13 |  | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) | 
 |  |