| HEAD STYLE | BUTTON |
| HEAD MAJOR DIAMETER | 1.063 INCHES MINIMUM AND 1.157 INCHES MAXIMUM |
| HEAT TREATMENT | ANNEALED OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-R-1223,GRADE M MIL SPEC ALL MATERIAL RESPONSES OVERALL OR ASTM A502,GRADE 1 ASSN STD 9TH MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 1108 OVERALL OR STEEL COMP 1109 OVERALL OR STEEL COMP 1110 OVERALL OR STEEL COMP 1117 OVERALL OR STEEL COMP 1118 OVERALL OR STEEL COMP 1119 OVERALL OR STEEL COMP 1137 OVERALL OR STEEL COMP 1140 OVERALL OR STEEL COMP 1141 OVERALL OR STEEL COMP 1144 OVERALL OR STEEL OVERALL |
| PROPRIETARY CHARACTERISTICS | PACS |
| SHANK DIAMETER | 0.600 INCHES MINIMUM AND 0.655 INCHES MAXIMUM |
| SHANK STYLE | STRAIGHT |
| FASTENER LENGTH | 1.375 INCHES NOMINAL |
| HEAD HEIGHT | 0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM |