| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.225 INCHES NOMINAL FIRST HOLE |
| FASTENER LENGTH | 1.375 INCHES NOMINAL |
| HARDNESS RATING | 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.312 INCHES NOMINAL |
| HEAD STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 630 OVERALL |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| SHOULDER DIAMETER | 0.497 INCHES MINIMUM AND 0.499 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER SHAPE | ROUND ALL SHOULDERS |
| SHOULDER LENGTH | 0.469 INCHES NOMINAL FIRST SHOULDER |
| SHOULDER LENGTH | 0.551 INCHES NOMINAL SECOND SHOULDER |
| SHOULDER WIDTH ACROSS FLATS | 0.385 INCHES MINIMUM AND 0.395 INCHES MAXIMUM FIRST SHOULDER |
| SHANK UNTHREADED HOLE DIAMETER | 0.077 INCHES MINIMUM AND 0.082 INCHES MAXIMUM FIRST HOLE |
| SPECIAL FEATURES | UNDERCUT BELOW HEAD,0.625 IN. DEA BY 0.126 IN.LG |
| WIDTH BETWEEN FLATS | 0.750 INCHES NOMINAL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.355 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD QUANTITY PER INCH | 28 |