| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.438 INCHES |
| THREAD QUANTITY PER INCH | 14 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.125 INCHES MINIMUM |
| FASTENER LENGTH | 6.000 INCHES NOMINAL |
| MATERIAL | STEEL OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | FF-B-584 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-Z-325,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 95.0 ROCKWELL B MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 55000 POUNDS PER SQUARE INCH |
| HEAD STYLE | BUTTON |
| HEAD DIAMETER | 0.907 INCHES MINIMUM AND |
| 0.969 INCHES MAXIMUM |
| HEAD HEIGHT | 0.219 INCHES MINIMUM AND |
| 0.239 INCHES MAXIMUM |
| NECK LENGTH | 0.219 INCHES MINIMUM AND |
| 0.250 INCHES MAXIMUM |
| NECK WIDTH | 0.431 INCHES MINIMUM AND |
| 0.452 INCHES MAXIMUM |
| NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND |
| A STYLE AND |
| 1 CLASS |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 81348 |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | FFB584TYPE1CLASS1STYLEA |