| THREAD SERIES DESIGNATOR | UN |
| NOMINAL THREAD DIAMETER | 2.250 INCHES |
| THREAD QUANTITY PER INCH | 12 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 3.310 INCHES NOMINAL |
| FASTENER LENGTH | 6.380 INCHES NOMINAL |
| MATERIAL | STEEL OR |
| STEEL COMP 4340 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A148 GRADE 150-135 ASSN STD 1ST MATERIAL RESPONSE OR |
| ASTM A331 ASSN STD 2ND MATERIAL RESPONSE OR |
| ASTM A322 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OR |
| ZINC AND |
| CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 CL 3 FED SPEC 1ST TREATMENT RESPONSE OR |
| ASTM B633 TY 2 CL FE/ZN5 ASSN STD 2ND TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 32.0 ROCKWELL C MINIMUM AND |
| 38.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD LENGTH | 7.000 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 2.000 INCHES MINIMUM AND |
| 2.120 INCHES MAXIMUM |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 5.440 INCHES MINIMUM AND |
| 5.470 INCHES MAXIMUM FIRST HOLE |
| SHANK UNTHREADED HOLE DIAMETER | 0.312 INCHES NOMINAL FIRST HOLE |