| DOCUMENT TYPE | INTERNATIONAL ORGANIZATION FOR STANDARDIZATION |
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 2.156 INCHES NOMINAL |
| HEAD DIAMETER | 0.161 INCHES MINIMUM AND 0.164 INCHES MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK |
| INTERNAL DRIVE STYLE | TORQUE-SET RIBBED |
| NOMINAL THREAD DIAMETER | 0.1640 INCHES |
| SCREW MATERIAL DOCUMENT AND CLASSIFICATION | QQ-Q-430 FED SPEC ALL MATERIAL RESPONSES OR AMS-QQ-A-225/6 NATIONAL SPEC ALL MATERIAL RESPONSES |
| SCREW MATERIAL | ALUMINUM ALLOY |
| SCREW SURFACE TREATMENT | ANODIZE |
| SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-A-8625, TYPE I OR II MIL STD ALL TREATMENT RESPONSES |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
| THREAD QUANTITY PER INCH | 32 |