| FASTENER LENGTH | 1.927 INCHES MINIMUM AND 1.947 INCHES MAXIMUM |
| HARDNESS RATING | 240.0 BRINELL STANDARD MINIMUM AND 280.0 BRINELL STANDARD MAXIMUM OVERALL |
| HEAD HEIGHT | 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| HOLE CONFIGURATION STYLE | HEXAGON FLATS |
| HOLE DIAMETER | 0.052 INCHES NOMINAL |
| HOLE QUANTITY | 1 |
| HOLE TYPE | DRILLED |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4140 OVERALL |
| NOMINAL THREAD DIAMETER | 0.375 INCHES |
| SHOULDER DIAMETER | 0.405 INCHES MINIMUM AND 0.406 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SHOULDER LENGTH | 1.271 INCHES MINIMUM AND 1.281 INCHES MAXIMUM FIRST SHOULDER |
| WIDTH BETWEEN FLATS | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.636 INCHES MINIMUM AND 0.676 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES DESIGNATOR | UNF |