| FASTENER LENGTH | 2.600 INCHES MINIMUM AND 3.200 INCHES MAXIMUM |
| HARDNESS RATING | 33.0 ROCKWELL C MINIMUM AND 38.00 ROCKWELL C MAXIMUM FASTENER |
| HEAD STYLE | HEADLESS (SETSCREW) |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A322 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-DTL-18240 MIL STD SINGLE MATERIAL RESPONSE LOCKING FEATURE |
| MATERIAL | STEEL OVERALL |
| III PART NAME ASSIGNED BY CONTROLLING AGENCY | STUD,ARMOR MOUNTING |
| III SUPPLEMENTARY FEATURES | REFER TO DRAWING FOR ADDITIONAL REQUIREMENTS |
| POINT STYLE | FLAT |
| POINT DIAMETER | 0.270 INCHES MINIMUM AND 0.300 INCHES MAXIMUM |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| SPECIAL FEATURES | MATT ST4130-ST4145, LOCKING ELEMENT IAW MIL-DTL-18240 |
| WIDTH ACROSS FLATS | 0.250 INCHES NOMINAL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM B633,TY II,SC 2,0.3 MILS THICK ASSN STD SINGLE TREATMENT RESPONSE FASTENER |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 2.100 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNF |