| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.190 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| FASTENER LENGTH | 0.343 INCHES MINIMUM AND |
| 0.375 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 1017 SECONDARY WASHER |
| STEEL COMP 1060 PRIMARY WASHER |
| STEEL COMP 1010 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-636 FED SPEC SINGLE MATERIAL RESPONSE SECONDARY WASHER |
| ASTM A29 ASSN STD SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| QQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE OR |
| QQ-S-637 ASSN STD 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 |
| HARDNESS RATING | 38.0 ROCKWELL C MINIMUM AND |
| 46.0 ROCKWELL C MAXIMUM PRIMARY WASHER |
| MINIMUM TENSILE STRENGTH | 55000 POUNDS PER SQUARE INCH |
| HEAD STYLE | PAN |
| HEAD DIAMETER | 0.357 INCHES MINIMUM AND |
| 0.373 INCHES MAXIMUM |
| HEAD HEIGHT | 0.099 INCHES MINIMUM AND |
| 0.110 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | SLOT |
| WASHER QUANTITY | 2 |
| PRIMARY WASHER STYLE | SPLIT HELICAL RING |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.337 INCHES NOMINAL |
| PRIMARY WASHER MATERIAL THICKNESS | 0.140 INCHES MAXIMUM |
| SECONDARY WASHER RELATIONSHIP TO PRIMARY WASHER | NOT IDENTICAL |
| SECONDARY WASHER STYLE | FLAT |
| SECONDARY WASHER OUTSIDE DIAMETER | 0.029 INCHES MINIMUM AND |
| 0.035 INCHES MAXIMUM |
| SECONDARY WASHER MATERIAL THICKNESS | 0.338 INCHES MINIMUM AND |
| 0.348 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 80205-NAS720 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |