| DRILLED HOLE DIAMETER | 0.312 INCHES NOMINAL |
| BEARING SURFACE TYPE | CHAMFERED |
| COUNTERSINK ANGLE | 43.0 DEGREES MINIMUM AND 47.0 DEGREES MAXIMUM BOTH ENDS |
| HOLE CONFIGURATION STYLE | CONFIGURATION C |
| HOLE TYPE AND QUANTITY | 2 DRILLED |
| MATERIAL DOCUMENT AND CLASSIFICATION | BS S62 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OR BS S80 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| NUT HEIGHT | 0.199 INCHES MINIMUM AND 0.210 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 0.431 INCHES MINIMUM AND 0.438 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ROLLS ROYCE LTD TN1010 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | SILVER OVERALL |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES | UNF |