DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.203 INCHES MINIMUM AND 1.263 INCHES MAXIMUM FIRST HOLE |
FASTENER LENGTH | 1.391 INCHES MINIMUM AND 1.431 INCHES MAXIMUM |
HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
HEAD HEIGHT | 0.172 INCHES MINIMUM AND 0.204 INCHES MAXIMUM |
HEAD STYLE | HEXAGON |
MATERIAL | STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 4130 OR STEEL COMP 4037 OVERALL |
MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH |
NOMINAL THREAD DIAMETER | 0.250 INCHES |
SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE |
SHOULDER DIAMETER | 0.309 INCHES MINIMUM AND 0.312 INCHES MAXIMUM FIRST SHOULDER |
SHOULDER SHAPE | ROUND FIRST SHOULDER |
SHOULDER LENGTH | 0.948 INCHES MAXIMUM AND 0.968 INCHES MAXIMUM FIRST SHOULDER |
SPECIFICATION/STANDARD DATA | 80205-NAS1297 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
WIDTH BETWEEN FLATS | 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL |
SURFACE TREATMENT | CHROMATE AND CADMIUM OVERALL |
THREAD CLASS | 3A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.352 INCHES MINIMUM AND 0.448 INCHES MAXIMUM |
THREAD QUANTITY PER INCH | 28 |
THREAD SERIES DESIGNATOR | UNJF |