| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 1.388 INCHES MINIMUM AND 1.418 INCHES MAXIMUM |
| GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM |
| GRIP LENGTH | 0.99 INCHES MINIMUM AND 1.01 INCHES MAXIMUM |
| HARDNESS RATING | |
| HEAD DIAMETER | 0.3988 INCHES NOMINAL |
| HEAD STYLE | FLAT COUNTERSUNK |
| INTERNAL DRIVE STYLE | TORQUE-SET RIBBED |
| MATERIAL | |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT, SHEAR 100 DEGREE FLUSH REDUCED HEAD |
| SPECIFICATION/STANDARD DATA | 80205-NSD1581 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| SURFACE TREATMENT | |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.403 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |