| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.000 INCHES NOMINAL |
| FASTENER LENGTH | 1.610 INCHES NOMINAL |
| MATERIAL | STEEL COMP 630 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5643 COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 35.0 ROCKWELL C MINIMUM AND |
| 42.0 ROCKWELL C MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 155000 POUNDS PER SQUARE INCH |
| HEAD STYLE | HEXAGON |
| HEAD HEIGHT | 0.155 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 0.435 INCHES NOMINAL |
| INTERNAL DRIVE STYLE | W/O INTERNAL DRIVE |
| POINT STYLE | BALL |
| POINT LENGTH | 0.220 INCHES NOMINAL |
| FEATURES PROVIDED | FINISHED HEAD |
| SPECIAL FEATURES | HOLE IN SHANK COUNTERSUNK 98-102 DEGREES TO 0.132-0.142 IN. BOTH SIDES; HOLE IN THREAD 0.092-0.102 IN. DIA |