| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.164 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.266 INCHES MAXIMUM |
| FASTENER LENGTH | 0.343 INCHES MINIMUM AND |
| 0.375 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 1017 OR |
| STEEL COMP 1020 OR |
| STEEL COMP 1025 SECONDARY WASHER |
| 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 |
| STEEL COMP 1010 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A 29 ASSN STD ALL MATERIAL RESPONSES PRIMARY WASHER |
| QQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE OR |
| QQ-S-737 FED SPEC SINGLE MATERIAL RESPONSE FASTENER |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TYPE 2, CLASS 2 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| MINIMUM TENSILE STRENGTH | 55000 POUNDS PER SQUARE INCH |
| HEAD STYLE | PAN NO. 2 |
| HEAD DIAMETER | 0.306 INCHES MINIMUM AND |
| 0.322 INCHES MAXIMUM |
| HEAD HEIGHT | 0.085 INCHES MINIMUM AND |
| 0.096 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE III |
| WASHER QUANTITY | 2 |
| PRIMARY WASHER STYLE | SPLIT HELICAL RING |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.296 INCHES MAXIMUM |
| PRIMARY WASHER MATERIAL THICKNESS | 0.040 INCHES MINIMUM |
| SECONDARY WASHER RELATIONSHIP TO PRIMARY WASHER | NOT IDENTICAL |
| SECONDARY WASHER STYLE | FLAT |
| SECONDARY WASHER OUTSIDE DIAMETER | 0.307 INCHES MINIMUM AND |
| 0.317 INCHES MAXIMUM |
| SECONDARY WASHER MATERIAL THICKNESS | 0.013 INCHES MINIMUM AND |
| 0.019 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 80205-NAS720 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |