| THREAD DIRECTION | RIGHT-HAND |
| FASTENER LENGTH | 2.173 INCHES MINIMUM AND |
| 2.203 INCHES MAXIMUM |
| MATERIAL | STEEL COMP E4340 OR |
| STEEL COMP 4140 OR |
| STEEL COMP 8740 OR |
| STEEL COMP 8735 OR |
| STEEL COMP 6150 OVERALL |
| THREAD LENGTH | 0.788 INCHES MINIMUM AND |
| 0.838 INCHES MAXIMUM |
| HEAD STYLE | DOUBLE HEXAGON W/HOLE |
| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.438 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 3A |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR |
| MIL-S-5626 MIL SPEC 2ND MATERIAL RESPONSE OR |
| -MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE OR |
| MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR |
| MIL-S-8503 MIL SPEC 5TH MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| HARDNESS RATING | 39.0 ROCKWELL C MINIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH |
| HEAD HEIGHT | 0.320 INCHES MINIMUM AND |
| 0.330 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.494 INCHES MINIMUM AND |
| 0.503 INCHES MAXIMUM |
| EXTENDED WASHER DIAMETER | 0.740 INCHES MINIMUM AND |
| 0.750 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.050 INCHES MINIMUM AND |
| 0.060 INCHES MAXIMUM |
| GRIP LENGTH | 1.365 INCHES MINIMUM AND |
| 1.385 INCHES MAXIMUM |
| SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| 63.0 MICROINCHES GRIP |
| 32.0 MICROINCHES THREADS |
| FEATURES PROVIDED | FINISHED HEAD |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 81996 |
| DESIGN CONTROL REFERENCE | 5306H34-009-3 |