| CONCENTRIC HOLE DEPTH | 1.113 INCHES NOMINAL |
| CONCENTRIC HOLE DIAMETER | 1.000 INCHES NOMINAL |
| COUNTERBORE DEPTH | 0.300 INCHES NOMINAL |
| COUNTERBORE DIAMETER | 0.250 INCHES NOMINAL |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.113 INCHES NOMINAL FIRST HOLE |
| FASTENER LENGTH | 2.304 INCHES MINIMUM AND 2.334 INCHES MAXIMUM |
| HEAD HEIGHT | 0.219 INCHES MINIMUM AND 0.234 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| INTERNAL THREAD CLASS | 2B CONCENTRIC HOLE |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | IRON ALLOY 660 OVERALL |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.437 INCHES |
| NOMINAL THREAD SIZE | 0.250 INCHES CONCENTRIC HOLE |
| SHANK UNTHREADED HOLE DIAMETER | 1.000 INCHES NOMINAL SECOND HOLE |
| SPECIAL FEATURES | PART PROVIDED WITH A FITTING LUBRICATION P/N MS15720-1 |
| STYLE DESIGNATOR | COUNTERBORE UNTHREADED |
| WIDTH BETWEEN FLATS | 0.678 INCHES MINIMUM AND 0.690 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY2 CL3 FED SPEC 1ST TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 3A |
| THREAD LENGTH | 0.569 INCHES MINIMUM AND 0.619 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNJF |
| THREAD SERIES | UNF CONCENTRIC HOLE |
| THREAD QUANTITY PER INCH | 20 |
| THREADS PER INCH | 28 CONCENTRIC HOLE |