| FASTENER LENGTH | 2.120 INCHES MINIMUM AND 2.180 INCHES MAXIMUM |
| HARDNESS RATING | 33.0 ROCKWELL C MINIMUM AND 38.0 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 | PLASTIC NYLON LOCKING FEATURE |
| MATERIAL | STEEL COMP 4130 OR STEEL COMP 4135 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 4142 OR STEEL COMP 4145 OR STEEL COMP 4340 OR STEEL COMP 8630 OR STEEL COMP 8635 OR STEEL COMP 8637 OR STEEL COMP 8640 OR STEEL COMP 8642 OR STEEL COMP 8645 FASTENER |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | STUD,ARMOR MOUNTING |
| POINT DIAMETER | 0.270 INCHES MINIMUM AND 0.300 INCHES MAXIMUM |
| POINT STYLE | FLAT |
| SPECIAL FEATURES | LOCKING ELEMENT IAW MIL-DTL-18240 |
| SUPPLEMENTARY FEATURES | REFER TO DRAWING FOR ADDITIONAL REQUIREMENTS |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM B633,TY II,SC 2,0.3 MILS THICK ASSN STD SINGLE TREATMENT RESPONSE FASTENER |
| SURFACE TREATMENT | ZINC FASTENER |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 2.100 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNF |
| WIDTH ACROSS FLATS | 0.250 INCHES NOMINAL |