| FASTENER LENGTH | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM |
| HEAD STYLE | HEADLESS (SETSCREW) |
| POINT STYLE | FLAT |
| INTERNAL DRIVE STYLE | HEXAGON |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| WIDTH ACROSS FLATS | 0.125 INCHES MINIMUM AND 0.127 INCHES MAXIMUM |
| HARDNESS RATING | 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL |
| MATERIAL | STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SPECIFICATION/STANDARD DATA | 80205-NAS1081 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |