| DEPARTURE FROM CITED DOCUMENT | AS MODIFIED BY ADDITION OF SQUARE NUT |
| FASTENER LENGTH | 1.500 INCHES NOMINAL |
| HARDNESS RATING | 207.0 BRINELL STANDARD MAXIMUM OVERALL |
| HEAD HEIGHT | 0.125 INCHES MINIMUM AND 0.145 INCHES MAXIMUM |
| HEAD DIAMETER | 0.563 INCHES MINIMUM AND 0.594 INCHES MAXIMUM |
| HEAD STYLE | BUTTON |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND 1 CLASS AND A STYLE |
| MATERIAL | STEEL OVERALL |
| MINIMUM TENSILE STRENGTH | 55000 POUNDS PER SQUARE INCH |
| NECK LENGTH | 0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM |
| NECK WIDTH | 0.245 INCHES MINIMUM AND 0.260 INCHES MAXIMUM |
| SPECIAL FEATURES | FURNISHED WITH ONE SQUARE NUT IN ACCORDANCE WITH FEDERAL SPECIFICATION FF-N-836 TYPE1 STYLE1 ZINC COATED |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.750 INCHES MINIMUM |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNC |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-Z-325,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC OVERALL |