| FASTENER LENGTH | 0.438 INCHES NOMINAL |
| HARDNESS RATING | 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM PRIMARY WASHER |
| HEAD DIAMETER | 0.292 INCHES MINIMUM AND 0.313 INCHES MAXIMUM |
| HEAD HEIGHT | 0.118 INCHES MINIMUM AND 0.130 INCHES MAXIMUM |
| HEAD STYLE | FILLISTER |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD ALL MATERIAL RESPONSES FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| 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 |
| NOMINAL THREAD DIAMETER | 0.190 INCHES |
| PRIMARY WASHER STYLE | SPLIT HELICAL RING |
| PRIMARY WASHER MATERIAL THICKNESS | 0.040 INCHES NOMINAL |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.283 INCHES MINIMUM AND 0.297 INCHES MAXIMUM |
| 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 DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.350 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNF |