| FASTENER LENGTH | 3.656 INCHES MINIMUM AND 3.750 INCHES MAXIMUM | 
| HARDNESS RATING | 80.0 ROCKWELL B MINIMUM OVERALL | 
| HEAD HEIGHT | 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM | 
| HEAD STYLE | HEXAGON | 
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD ALL MATERIAL RESPONSES OVERALL | 
| MATERIAL | STEEL COMP 301  OR STEEL COMP 302  OR STEEL COMP 302B  OR STEEL COMP 303  OR STEEL COMP 303SE  OR STEEL COMP 304  OR STEEL COMP 304L  OR STEEL COMP 305  OR STEEL COMP 308  OR STEEL COMP 309  OR STEEL COMP 309S  OR STEEL COMP 310  OR STEEL COMP 310S  OR STEEL COMP 314  OR STEEL COMP 316  OR STEEL COMP 316L  OR STEEL COMP 317  OR STEEL COMP 321  OR STEEL COMP 347  OR STEEL COMP 348  OR STEEL COMP 384  OR STEEL COMP 385 OVERALL | 
| MINIMUM TENSILE STRENGTH | 80000 POUNDS PER SQUARE INCH | 
| MINIMUM YIELD STRENGTH | 30000 POUNDS PER SQUARE INCH | 
| NOMINAL THREAD DIAMETER | 0.312 INCHES | 
| NONDEFINITIVE SPEC/STD DATA | 2 TYPE AND 10P STYLE | 
| SURFACE FINISH | 63.0 MICROINCHES THREADS | 
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | 
| SURFACE TREATMENT | PASSIVATE OVERALL | 
| THREAD CLASS | 2A | 
| THREAD DIRECTION | RIGHT-HAND | 
| THREAD LENGTH | 0.874 INCHES MINIMUM AND 1.062 INCHES MAXIMUM | 
| THREAD QUANTITY PER INCH | 18 | 
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) | 
| WIDTH BETWEEN FLATS | 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM |