| FASTENER LENGTH | 2.440 INCHES MINIMUM AND 2.560 INCHES MAXIMUM |
| HARDNESS RATING | 85.0 ROCKWELL B MINIMUM AND 100.0 ROCKWELL B MAXIMUM OVERALL |
| HEAD HEIGHT | 0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM |
| HEAD DIAMETER | 1.032 INCHES MINIMUM AND 1.094 INCHES MAXIMUM |
| HEAD STYLE | BUTTON |
| MATERIAL | STEEL OVERALL |
| MINIMUM TENSILE STRENGTH | 69000 POUNDS PER SQUARE INCH |
| NECK LENGTH | 0.250 INCHES MINIMUM AND 0.281 INCHES MAXIMUM |
| NECK WIDTH | 0.492 INCHES MINIMUM AND 0.515 INCHES MAXIMUM |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | GRADE 72,GM 4435-M CODE A,FSCM 11862 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PHOSPHATE OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 2.200 INCHES MINIMUM |
| THREAD QUANTITY PER INCH | 13 |
| THREAD SERIES DESIGNATOR | UNRC |