| THREAD DIRECTION | RIGHT-HAND |
| FASTENER LENGTH | 0.469 INCHES MINIMUM AND |
| 0.500 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 1013 OR |
| STEEL COMP 1015 OR |
| STEEL COMP 1016 OR |
| STEEL COMP 1017 OR |
| STEEL COMP 1018 OR |
| STEEL COMP 1019 OR |
| STEEL COMP 1020 OR |
| STEEL COMP 1021 OR |
| STEEL COMP 1022 OR |
| STEEL COMP 1023 OR |
| STEEL COMP 1025 OR |
| STEEL COMP 1026 OR |
| STEEL COMP 1029 OR |
| STEEL COMP 1030 OR |
| STEEL COMP 1033 OR |
| STEEL COMP 1034 OR |
| STEEL COMP 1035 OR |
| STEEL COMP 1037 OR |
| STEEL COMP 1038 OR |
| STEEL COMP 1039 OR |
| STEEL COMP 1040 OR |
| STEEL COMP 1524 OR |
| STEEL COMP 1527 OR |
| STEEL COMP 1536 OR |
| STEEL COMP 1541 OVERALL |
| THREAD LENGTH | 0.386 INCHES MINIMUM AND |
| 0.500 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 2A |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| SURFACE TREATMENT | PHOSPHATE ZINC OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-P-16232 TY Z CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 32.0 ROCKWELL C MINIMUM AND |
| 38.0 ROCKWELL C MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 150000 POUNDS PER SQUARE INCH |
| HEAD HEIGHT | 0.195 INCHES MINIMUM AND |
| 0.211 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.489 INCHES MINIMUM AND |
| 0.500 INCHES MAXIMUM |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.224 INCHES MINIMUM AND |
| 0.385 INCHES MAXIMUM FIRST HOLE |
| SHANK UNTHREADED HOLE DIAMETER | 0.074 INCHES MINIMUM AND |
| 0.082 INCHES MAXIMUM FIRST HOLE |
| FEATURES PROVIDED | FINISHED HEAD |
| NONDEFINITIVE SPEC/STD DATA | 2 TYPE AND |
| 10P STYLE AND |
| 8 GRADE |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 81348 |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | FFS85 |
| MANUFACTURERS CODE | 96906 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MS51108-29 |