| DISTANCE FROM CENTERLINE TO FLAT | 0.250 INCHES NOMINAL |
| DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS | 0.060 INCHES NOMINAL |
| FASTENER LENGTH | 2.125 INCHES NOMINAL |
| HARDNESS RATING | 32.0 ROCKWELL C MINIMUM OVERALL AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 0.970 INCHES NOMINAL |
| HEAD HEIGHT | 0.220 INCHES NOMINAL |
| HEAD STYLE | DEE CHAMFER |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 8635 OVERALL OR STEEL COMP 8640 OVERALL OR STEEL COMP 8735 OVERALL OR STEEL COMP 8740 OVERALL |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| SPECIAL FEATURES | 45 DEGREE ANGLE PLUS OR MINUS 2 DEGREES ON BOTH CORNERS OF HEAD 0.190 INCH FROM CENTERLINE OF SHANK |
| RIB QUANTITY | 64 |
| RIB LENGTH | 0.160 INCHES NOMINAL |
| RIB MAJOR DIAMETER | 0.508 INCHES MINIMUM AND 0.512 INCHES MAXIMUM |
| RIB MINOR DIAMETER | 0.491 INCHES NOMINAL |
| SHOULDER DIAMETER | 0.508 INCHES MINIMUM FIRST SHOULDER AND 0.512 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 0.160 INCHES NOMINAL FIRST SHOULDER |
| SHOULDER SHAPE | RIBBED FIRST SHOULDER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | CLASS B-2 FSCM 11862 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PHOSPHATE OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.880 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNF |