| FASTENER LENGTH | 0.500 INCHES NOMINAL | 
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM OVERALL AND 43.0 ROCKWELL C MAXIMUM OVERALL | 
| HEAD DIAMETER | 0.154 INCHES MINIMUM AND 0.164 INCHES MAXIMUM | 
| HEAD HEIGHT | 0.038 INCHES MINIMUM AND 0.046 INCHES MAXIMUM | 
| HEAD STYLE | BUTTON | 
| INTERNAL DRIVE STYLE | SIX SPLINE | 
| MATERIAL DOCUMENT AND CLASSIFICATION | AISI 4037 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | 
| MATERIAL | STEEL COMP 4037 OVERALL | 
| PROPRIETARY CHARACTERISTICS | PACS | 
| NOMINAL THREAD DIAMETER | 0.086 INCHES | 
| SPLINE MAJOR DIAMETER | 0.061 INCHES MINIMUM AND 0.062 INCHES MAXIMUM | 
| SPLINE MINOR DIAMETER | 0.050 INCHES MINIMUM AND 0.051 INCHES MAXIMUM | 
| SPLINE WIDTH | 0.013 INCHES MINIMUM AND 0.014 INCHES MAXIMUM | 
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-13924 CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | 
| SURFACE TREATMENT | OXIDE OVERALL | 
| THREAD CLASS | 3A | 
| THREAD DIRECTION | RIGHT-HAND | 
| THREAD LENGTH | 0.464 INCHES MINIMUM AND 0.500 INCHES MAXIMUM | 
| THREAD QUANTITY PER INCH | 56 | 
| THREAD SERIES DESIGNATOR | UNC |