| FASTENER LENGTH | 0.750 INCHES NOMINAL |
| HEAD DIAMETER | 0.303 INCHES MINIMUM AND 0.312 INCHES MAXIMUM |
| HEAD HEIGHT | 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM |
| HEAD STYLE | FLAT CHAMFER |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD ALL MATERIAL RESPONSES PRIMARY WASHER |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD SINGLE MATERIAL RESPONSE FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD SINGLE MATERIAL RESPONSE SECONDARY WASHER |
| MATERIAL | STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1566 OR STEEL COMP 1069 OR STEEL COMP 1070 OR STEEL COMP 1071 OR STEEL COMP 1572 OR STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1078 OR STEEL COMP 1080 PRIMARY WASHER |
| MATERIAL | STEEL FASTENER |
| MATERIAL | STEEL SECONDARY WASHER |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| PRIMARY WASHER STYLE | SPLIT HELICAL RING |
| SECONDARY WASHER MATERIAL THICKNESS | 0.062 INCHES NOMINAL |
| SECONDARY WASHER OUTSIDE DIAMETER | 0.562 INCHES NOMINAL |
| SECONDARY WASHER STYLE | FLAT |
| SECONDARY WASHER RELATIONSHIP TO PRIMARY WASHER | IDENTICAL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2,CL 2 FED SPEC 1ST TREATMENT RESPONSE OR ASTM B633 CL FE/ZN 12 TY 2 ASSN STD 2ND TREATMENT RESPONSE FASTENER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR ASTM B633 CL FE/ZN 12 TY 2 ASSN STD 2ND TREATMENT RESPONSE SECONDARY WASHER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR ASTM B633 CL FE/ZN 12 TY 2 ASSN STD 2ND TREATMENT RESPONSE PRIMARY WASHER |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OR ZINC AND CHROMATE FASTENER |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OR ZINC AND CHROMATE PRIMARY WASHER |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OR ZINC AND CHROMATE SECONDARY WASHER |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.440 INCHES MINIMUM |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES DESIGNATOR | UNF |
| WASHER QUANTITY | 2 |
| WIDTH ACROSS FLATS | 0.156 INCHES MINIMUM AND 0.158 INCHES MAXIMUM |