| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 3.234 INCHES MINIMUM AND 3.266 INCHES MAXIMUM FIRST HOLE |
| CONCENTRIC HOLE DIAMETER | 0.375 INCHES NOMINAL |
| FASTENER LENGTH | 3.437 INCHES MINIMUM AND 3.484 INCHES MAXIMUM |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.220 INCHES NOMINAL |
| HEAD STYLE | HEXAGON |
| MATERIAL | STEEL COMP E4340 OR STEEL COMP 4340 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 OR STEEL COMP 4140 OR STEEL COMP 4037 OVERALL |
| NOMINAL THREAD DIAMETER | 0.875 INCHES |
| SHANK UNTHREADED HOLE DIAMETER | 0.141 INCHES NOMINAL FIRST HOLE |
| WIDTH BETWEEN FLATS | 1.240 INCHES MINIMUM AND 1.253 INCHES MAXIMUM |
| STYLE DESIGNATOR | CONCENTRIC HOLE UNTHREADED |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | CVA5-2,FSCM 80378 MFR REF 2ND TREATMENT RESPONSE THREADS |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | CVA5-2,FSCM 80378 MFR REF 1ST TREATMENT RESPONSE HEAD |
| SURFACE TREATMENT | CADMIUM HEAD |
| SURFACE TREATMENT | CADMIUM THREADS |
| TEST DATA DOCUMENT | 81349-MIL-I-6870 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.643 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 14 |
| THREAD SERIES DESIGNATOR | UNF |