| FASTENER LENGTH | 0.844 INCHES NOMINAL0.844 INCHES NOMINAL |
| GROOVE DIAMETER | 0.095 INCHES MINIMUM AND 0.095 INCHES MINIMUM AND 0.105 INCHES MAXIMUM0.105 INCHES MAXIMUM |
| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL32.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.078 INCHES NOMINAL0.078 INCHES NOMINAL |
| HEAD DIAMETER | 0.312 INCHES NOMINAL0.312 INCHES NOMINAL |
| HEAD STYLE | BUTTONBUTTON |
| INTERNAL DRIVE STYLE | SLOTSLOT |
| MATERIAL | STEEL COMP 4140 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8740 OR STEEL COMP 8630 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 8735 OR STEEL COMP 4130 OR STEEL COMP 4130 OR STEEL COMP 4037 OVERALLSTEEL COMP 4037 OVERALL |
| MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH125000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.138 INCHES0.138 INCHES |
| SINGLE SHEAR STRENGTH | 1060 POUNDS PER SQUARE INCH1060 POUNDS PER SQUARE INCH |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALLQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CADMIUM AND CHROMATE OVERALLCHROMATE OVERALL |
| THREAD LENGTH | 0.251 INCHES MINIMUM0.251 INCHES MINIMUM |
| THREAD CLASS | 3A3A |
| THREAD DIRECTION | RIGHT-HANDRIGHT-HAND |
| THREAD SERIES DESIGNATOR | UNFUNF |
| THREAD QUANTITY PER INCH | 4040 |