| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.875 INCHES NOMINAL |
| FASTENER LENGTH | 2.750 INCHES NOMINAL |
| MATERIAL | STEEL COMP 3135 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| HARDNESS RATING | 269.0 BRINELL STANDARD MINIMUM AND |
| 302.0 BRINELL STANDARD MAXIMUM OVERALL |
| HEAD DIAMETER | 0.750 INCHES NOMINAL |
| HEAD HEIGHT | 0.250 INCHES NOMINAL |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SHOULDER DIAMETER | 0.5000 INCHES MINIMUM AND |
| 0.5002 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 0.125 INCHES NOMINAL FIRST SHOULDER |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 2.625 INCHES NOMINAL FIRST HOLE |
| SHANK UNTHREADED HOLE DIAMETER | 0.125 INCHES NOMINAL FIRST HOLE |