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		                             National Stock Number: 5307-01-394-2402
  Federal Supply Class: 5307
  National Item Identification Number: 013942402
  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:
 | M63540/4-20 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |  | MIL-S-63540/4 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |   
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  Techincal Specification:
 | MATERIAL | STEEL CORROSION RESISTING |  | SURFACE TREATMENT | PASSIVATE OVERALL |  | STYLE DESIGNATOR | SELF-LOCKING |  | HEAD DIAMETER | 0.350 INCHES NOMINAL |  | HEAD LENGTH | 0.075 INCHES NOMINAL |  | HEAD MINOR DIAMETER | 0.311 INCHES NOMINAL |  | OVERALL LENGTH | 0.610 INCHES MINIMUM AND |   | 0.640 INCHES MAXIMUM |  | THREAD SERIES DESIGNATOR | UNC NUT THREAD |  | NOMINAL THREAD SIZE | 0.190 INCHES |  | THREAD CLASS | 2A NUT THREAD |  | THREAD QUANTITY PER INCH | 24 NUT THREAD |  | THREAD DIRECTION | RIGHT-HAND NUT THREAD |  | THREAD LENGTH | 0.610 INCHES MINIMUM AND |   | 0.640 INCHES MAXIMUM |  | LOCKING FEATURE | SELF-CLINCHING HEAD |  | SPEC/STD CONTROLLING DATA |  |  | MANUFACTURERS CODE | 81349 |  | NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MIL-S-63540/4 |  | DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | M63540/4-20 |   
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