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		                        | National Stock Number:
 5307-01-612-5540
 
 Federal Supply Class:
 5307
 
 National Item Identification Number:
 016125540
 
 Description:
 STUD,SELF-LOCKING
 
 Detail:
 A headed fastener threaded externally on a portion or on the full length of the shank. The head has projections on the underside or periphery, or is otherwise designed to be mechanically pressed and embedded in a metallic panel, or the like. It is securely locked in position by the displaced metal. For items that require locking rings, see BOLT, SELF-LOCKING and STUD, LOCKED IN. Excludes INSERT, SCREW THREAD.
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 Manufacturer Information:
 
 | 7521060-002 | 15090 | RAYTHEON COMPANY |  | 7521060-002 | 53711 | NAVAL SEA SYSTEMS COMMAND |  | FHS-M4-20 | 05394 | PEM MACHINE AND TOOL CO INC | 
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 Techincal Specification:
 
 | HEAD DIAMETER | 5.9 MILLIMETERS NOMINAL |  | HEAD LENGTH | 2.40 MILLIMETERS MAXIMUM |  | LOCKING FEATURE | SELF-CLINCHING HEAD |  | MATERIAL | STEEL CORROSION RESISTING |  | PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT INSERT THREADED |  | PROPRIETARY CHARACTERISTICS | PACS |  | NOMINAL THREAD SIZE | 4.0 MILLIMETERS STUD THREAD |  | OVERALL LENGTH | 20.0 MILLIMETERS NOMINAL |  | STYLE DESIGNATOR | SELF-LOCKING |  | SURFACE TREATMENT | PASSIVATE OVERALL |  | THREAD CLASS | 6G STUD THREAD |  | THREAD DIRECTION | RIGHT-HAND STUD THREAD |  | THREAD SERIES DESIGNATOR | M STUD THREAD | 
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