| FASTENER LENGTH | 0.375 INCHES NOMINAL |
| HEAD DIAMETER | 0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM |
| HEAD HEIGHT | 0.072 INCHES MINIMUM AND 0.082 INCHES MAXIMUM |
| HEAD STYLE | PAN NO. 2 |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD ALL MATERIAL RESPONSES PRIMARY WASHER |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD ALL MATERIAL RESPONSES FASTENER |
| MATERIAL | STEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 FASTENER |
| MATERIAL | STEEL COMP 1050 OR STEEL COMP 1551 OR STEEL COMP 1552 OR STEEL COMP 1053 OR STEEL COMP 1055 OR STEEL COMP 1060 PRIMARY WASHER |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.270 INCHES MINIMUM AND 0.280 INCHES MAXIMUM |
| PRIMARY WASHER STYLE | FLAT EXTERNAL TEETH |
| PRIMARY WASHER MATERIAL THICKNESS | 0.016 INCHES NOMINAL |
| WASHER QUANTITY | 1 |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| THREAD CLASS | 2A |
| THREAD LENGTH | 0.313 INCHES MINIMUM |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNC |