| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.190 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.628 INCHES MINIMUM AND |
| 1.750 INCHES MAXIMUM |
| FASTENER LENGTH | 1.690 INCHES MINIMUM AND |
| 1.750 INCHES MAXIMUM |
| MATERIAL | STEEL CORROSION RESISTING PRIMARY WASHER |
| STEEL CORROSION RESISTING FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5626,COND F MIL SPEC SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| AMS 6300 ASSN STD 1ST MATERIAL RESPONSE OR |
| MIL-S-6050 MIL SPEC 2ND MATERIAL RESPONSE FASTENER |
| SURFACE TREATMENT | ENAMEL PRIMARY WASHER |
| CADMIUM FASTENER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | 595,COLOR 13538 FED STD SINGLE TREATMENT RESPONSE PRIMARY WASHER |
| QQ-P-416,TY 2 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND |
| 40.0 ROCKWELL C MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| HEAD STYLE | PAN |
| HEAD DIAMETER | 0.357 INCHES MINIMUM AND |
| 0.373 INCHES MAXIMUM |
| HEAD HEIGHT | 0.122 INCHES MINIMUM AND |
| 0.133 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| WASHER QUANTITY | 1 |
| PRIMARY WASHER STYLE | FLAT |
| PRIMARY WASHER OUTSIDE DIAMETER | 1.625 INCHES NOMINAL |
| PRIMARY WASHER MATERIAL THICKNESS | 0.300 INCHES NOMINAL |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 98897 |
| DESIGN CONTROL REFERENCE | 4S31809-101A |