| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.190 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.413 INCHES MINIMUM AND |
| 0.480 INCHES MAXIMUM |
| FASTENER LENGTH | 0.500 INCHES NOMINAL |
| MATERIAL | STEEL PRIMARY WASHER |
| STEEL FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE J429 GR 2 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| SURFACE TREATMENT | CADMIUM OR |
| ZINC OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2400-1 ASSN STD 1ST TREATMENT RESPONSE OR |
| AMS 2402-1 ASSN STD 2ND TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND |
| 50.0 ROCKWELL C MAXIMUM PRIMARY WASHER |
| 80.0 ROCKWELL B MINIMUM AND |
| 100.0 ROCKWELL B MAXIMUM FASTENER |
| MINIMUM TENSILE STRENGTH | 74000 POUNDS PER SQUARE INCH |
| MINIMUM YIELD STRENGTH | 57000 POUNDS PER SQUARE INCH |
| HEAD STYLE | HEXAGON |
| HEAD HEIGHT | 0.105 INCHES MINIMUM AND |
| 0.120 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.305 INCHES MINIMUM AND |
| 0.312 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | SLOT |
| WASHER QUANTITY | 1 |
| PRIMARY WASHER STYLE | FLAT EXTERNAL TEETH |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.395 INCHES MINIMUM AND |
| 0.410 INCHES MAXIMUM |
| PRIMARY WASHER MATERIAL THICKNESS | 0.020 INCHES MINIMUM AND |
| 0.025 INCHES MAXIMUM |