| CONCENTRIC HOLE DEPTH | 0.413 INCHES MINIMUM AND 0.443 INCHES MAXIMUM |
| CONCENTRIC HOLE DIAMETER | 0.125 INCHES NOMINAL |
| FASTENER LENGTH | 1.740 INCHES MINIMUM AND 1.765 INCHES MAXIMUM |
| HEAD DIAMETER | 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |
| HEAD HEIGHT | 0.135 INCHES MINIMUM AND 0.140 INCHES MAXIMUM |
| HEAD STYLE | ROUND W/WRENCH FLATS |
| INTERNAL THREAD CLASS | 2B SECOND SHOULDER |
| INTERNAL THREAD DIRECTION | RIGHT-HAND COUNTERBORE |
| INTERNAL THREAD LENGTH | 0.308 INCHES MINIMUM COUNTERBORE |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM B196 ASSN STD 1ST MATERIAL RESPONSE OVERALL OR ASTM B197 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| MATERIAL | COPPER ALLOY 173 OVERALL OR COPPER ALLOY 172 OVERALL |
| PROPRIETARY CHARACTERISTICS | PACS |
| MINIMUM TENSILE STRENGTH | 185000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| NOMINAL THREAD SIZE | 0.112 INCHES COUNTERBORE |
| SPECIAL FEATURES | UNTREADED LTH 1.175 IN. MIN 1.195 IN. MAX; 0.123 IN. MIN 0.127 IN. MAX DIAMETER |
| WIDTH BETWEEN FLATS | 0.183 INCHES MINIMUM AND 0.187 INCHES MAXIMUM |
| STYLE DESIGNATOR | COUNTERBORE THREADED |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.540 INCHES MINIMUM AND 0.600 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD SERIES | UNC COUNTERBORE |
| THREADS PER INCH | 40 COUNTERBORE |