| FASTENER LENGTH | 4.500 INCHES NOMINAL |
| FEATURES PROVIDED | UNFINISHED HEAD |
| HARDNESS RATING | 95.0 ROCKWELL B MAXIMUM OVERALL |
| HEAD HEIGHT | 0.812 INCHES MINIMUM AND 0.876 INCHES MAXIMUM |
| HEAD STYLE | SQUARE |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE GR 1 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| MINIMUM TENSILE STRENGTH | 55000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 1.250 INCHES |
| NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND 1 GRADE |
| WIDTH BETWEEN FLATS | 1.812 INCHES MINIMUM AND 1.875 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2 CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325 TY 2 CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OR ZINC OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 2.750 INCHES MINIMUM |
| THREAD QUANTITY PER INCH | 7 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |