| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.625 INCHES |
| THREAD QUANTITY PER INCH | 18 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.877 INCHES MINIMUM AND |
| 0.927 INCHES MAXIMUM |
| FASTENER LENGTH | 3.262 INCHES MINIMUM AND |
| 3.292 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 4140 OR |
| STEEL COMP E4340 OR |
| STEEL COMP 6150 OR |
| STEEL COMP 8735 OR |
| STEEL COMP 8740 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR |
| MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR |
| MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR |
| MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR |
| MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND |
| 40.0 ROCKWELL C MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| STYLE DESIGNATOR | CONCENTRIC HOLE THREADED |
| CONCENTRIC HOLE DIAMETER | 0.332 INCHES NOMINAL |
| THREAD SERIES | UNF CONCENTRIC HOLE |
| NOMINAL THREAD SIZE | 0.312 INCHES CONCENTRIC HOLE |
| THREADS PER INCH | 24 CONCENTRIC HOLE |
| INTERNAL THREAD CLASS | 3B CONCENTRIC HOLE |
| INTERNAL THREAD DIRECTION | RIGHT-HAND CONCENTRIC HOLE |
| INTERNAL THREAD LENGTH | 0.500 INCHES NOMINAL CONCENTRIC HOLE |
| HEAD STYLE | DISHED HEXAGON |
| HEAD HEIGHT | 0.312 INCHES MINIMUM AND |
| 0.327 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.928 INCHES MINIMUM AND |
| 0.940 INCHES MAXIMUM |
| SPECIAL FEATURES | KEYWAY IN THD,0.1552 IN. MIN,0.1562 IN. MAX W BY 0.720 IN. MIN,0.780 IN MAX LG OF FULLKEYWAY |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 77272 |
| DESIGN CONTROL REFERENCE | 114P7013-1 |