| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.625 INCHES |
| THREAD QUANTITY PER INCH | 18 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.938 INCHES NOMINAL |
| FASTENER LENGTH | 2.250 INCHES NOMINAL |
| MATERIAL | STEEL OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2, CL 2. FED SPEC ALL TREATMENT RESPONSES OVERALL |
| HEAD STYLE | BEVEL-CONICAL |
| HEAD DIAMETER | 1.040 INCHES MINIMUM AND |
| 1.050 INCHES MAXIMUM |
| HEAD HEIGHT | 0.5005 INCHES MINIMUM AND |
| 0.5035 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 0.5005 INCHES MINIMUM AND |
| 0.5035 INCHES MAXIMUM |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SHOULDER DIAMETER | 0.6542 INCHES MINIMUM AND |
| 0.6552 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 1.870 INCHES NOMINAL FIRST SHOULDER |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT,INTERNAL WRENCHING,.0312 OVERSIZE. |