| EXTENDED WASHER DIAMETER | 1.428 INCHES MINIMUM AND 1.438 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.188 INCHES MINIMUM AND 0.208 INCHES MAXIMUM |
| FASTENER LENGTH | 3.179 INCHES MINIMUM AND 3.209 INCHES MAXIMUM |
| GRIP DIAMETER | 0.8730 INCHES MINIMUM AND 0.8740 INCHES MAXIMUM |
| GRIP LENGTH | 1.990 INCHES MINIMUM AND 2.010 INCHES MAXIMUM |
| HARDNESS RATING | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.798 INCHES MINIMUM AND 0.818 INCHES MAXIMUM |
| HEAD STYLE | DOUBLE HEXAGON W/HOLE |
| MATERIAL | STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 OVERALL |
| MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.875 INCHES |
| SPECIFICATION/STANDARD DATA | 80205-NAS634 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| WIDTH BETWEEN FLATS | 0.934 INCHES MINIMUM AND 0.943 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | NAS672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.169 INCHES MINIMUM AND 1.219 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 14 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |