| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.199 INCHES MINIMUM AND |
| 0.231 INCHES MAXIMUM |
| FASTENER LENGTH | 0.296 INCHES MINIMUM AND |
| 0.328 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 302 OR |
| STEEL COMP 303 OR |
| STEEL COMP 304 OR |
| STEEL COMP 305 OR |
| STEEL COMP 316 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 80.0 ROCKWELL C MINIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 80000 POUNDS PER SQUARE INCH |
| MINIMUM YIELD STRENGTH | 30000 POUNDS PER SQUARE INCH |
| HEAD STYLE | FLAT COUNTERSUNK |
| HEAD DIAMETER | 0.263 INCHES MINIMUM AND |
| 0.307 INCHES MAXIMUM |
| COUNTERSINK ANGLE | 80.0 DEGREES MINIMUM AND |
| 84.0 DEGREES MAXIMUM |
| INTERNAL DRIVE STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 0.078 INCHES NOMINAL |
| LOCKING FEATURE | PELLET OR |
| STRIP THREADS |
| NONDEFINITIVE SPEC/STD DATA | 4 TYPE |
| DEPARTURE FROM CITED DESIGNATOR | AS MOD BY LOCKING FEATURE |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 81348 |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | FFS86 |