| THREAD DIRECTION | RIGHT-HAND |
| FASTENER LENGTH | 3.250 INCHES NOMINAL |
| MATERIAL | STEEL COMP 4140 OR |
| STEEL COMP 8740 OR |
| STEEL COMP 8630 OR |
| STEEL COMP 8735 OR |
| STEEL COMP 4130 OR |
| STEEL COMP 4037 OVERALL |
| THREAD LENGTH | 0.639 INCHES MINIMUM |
| HEAD STYLE | HEXAGON |
| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| THREAD QUANTITY PER INCH | 18 |
| THREAD CLASS | 3A |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR |
| MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR |
| MIL-S-6050 MIL SPEC 3RD MATERIAL RESPONSE OR |
| MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR |
| MIL-S-6758 MIL SPEC 5TH MATERIAL RESPONSE OR |
| AMS 6300 ASSN STD 6TH MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND |
| 32.0 ROCKWELL C MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH |
| HEAD HEIGHT | 0.266 INCHES MINIMUM AND |
| 0.297 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.492 INCHES MINIMUM AND |
| 0.501 INCHES MAXIMUM |
| HOLE CONFIGURATION STYLE | HEXAGON LONGITUDINAL HOLE |
| HOLE TYPE | DRILLED |
| HOLE QUANTITY | 6 |
| HOLE DIAMETER | 0.188 INCHES NOMINAL |
| GRIP LENGTH | 2.611 INCHES NOMINAL |
| FEATURES PROVIDED | FINISHED HEAD |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 26512 |
| DESIGN CONTROL REFERENCE | 89PM10861-1 |