| DISTANCE FROM CENTERLINE TO FLAT | 0.492 INCHES MINIMUM AND 0.498 INCHES MAXIMUM |
| FASTENER LENGTH | 2.280 INCHES NOMINAL |
| HEAD DIAMETER | 1.220 INCHES MINIMUM AND 1.280 INCHES MAXIMUM |
| HEAD HEIGHT | 0.250 INCHES NOMINAL |
| HEAD STYLE | DEE CHAMFER |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6427 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| SHOULDER DIAMETER | 0.622 INCHES MINIMUM AND 0.623 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SHOULDER LENGTH | 1.775 INCHES MINIMUM AND 1.781 INCHES MAXIMUM FIRST SHOULDER |
| SPECIAL FEATURES | SHOULDER MACHINED TO 63 MICROINCHES |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | PS-10,FSCM 19315 MFR REF 1ST TREATMENT RESPONSE OR PS1002,TY 2 CL A,FSCM 19315 MFR REF 2ND TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OR CHROMIUM OVERALL |
| TEST DATA DOCUMENT | 81349-MIL-I-680 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.499 INCHES MINIMUM AND 0.505 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNF |