| FASTENER LENGTH | 2.210 INCHES MINIMUM AND 2.250 INCHES MAXIMUM |
| GRIP LENGTH | 0.812 INCHES MINIMUM AND 1.250 INCHES MAXIMUM |
| HARDNESS RATING | 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.250 INCHES MINIMUM AND 0.260 INCHES MAXIMUM |
| HEAD STYLE | DISHED HEXAGON |
| LOCKING FEATURE | DISTORTIONS HEAD |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE J429 GRADE 8 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL OVERALL |
| MINIMUM YIELD STRENGTH | 130000 POUNDS PER SQUARE INCH |
| MINIMUM TENSILE STRENGTH | 150000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.375 INCHES |
| WIDTH BETWEEN FLATS | 0.612 INCHES MINIMUM AND 0.625 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.438 INCHES MINIMUM AND 0.960 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 16 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |