| HEAD COUNTERSINK ANGLE | 99.00 DEGREES MINIMUM AND 101.00 DEGREES MAXIMUM |
| HEAD DIAMETER | 0.656 INCHES NOMINAL |
| HEAD HEIGHT | 0.104 INCHES MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK REVERSE KEYED |
| KEY LENGTH | 0.104 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A546 ASSN STD ALL MATERIAL RESPONSES OR ASTM A545 ASSN STD ALL MATERIAL RESPONSES OR ASTM A547 ASSN STD ALL MATERIAL RESPONSES OR ASTM A548 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 1108 OR STEEL COMP 1110 OVERALL |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| NUT DIAMETER | 0.409 INCHES MINIMUM AND 0.413 INCHES MAXIMUM |
| NUT LENGTH | 1.203 INCHES MINIMUM AND 1.233 INCHES MAXIMUM |
| NUT STYLE | BLIND RIVET W/SMOOTH ROUND SHANK |
| SHANK END TYPE | CLOSED |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UNIFIED NATIONAL COARSE (UNC) |
| THREAD QUANTITY PER INCH | 18 |