| HEAD DIAMETER | 0.990 INCHES NOMINAL |
| HEAD COUNTERSINK ANGLE | 99.00 DEGREES MINIMUM AND 101.00 DEGREES MAXIMUM |
| HEAD HEIGHT | 0.154 INCHES MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK REVERSE KEYED |
| KEY LENGTH | 0.154 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | FED STD 66,AISI 1108 FED STD 1ST MATERIAL RESPONSE OR FED STD 66,AISI 1110 FED STD 2ND MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 1108 OR STEEL COMP 1110 OVERALL |
| NOMINAL THREAD SIZE | 0.500 INCHES |
| NUT DIAMETER | 0.636 INCHES MINIMUM AND 0.640 INCHES MAXIMUM |
| NUT LENGTH | 1.891 INCHES MINIMUM AND 1.921 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 | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 13 |
| THREAD SERIES | UNIFIED NATIONAL COARSE (UNC) |