| COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL |
| FASTENER LENGTH | 1.990 INCHES MINIMUM AND 2.010 INCHES MAXIMUM |
| HEAD MAJOR DIAMETER | 0.175 INCHES MINIMUM AND 0.183 INCHES MAXIMUM |
| HEAD STYLE | FLUSH (FLAT) COUNTERSUNK (INCLUDED ANGLE - LESS THAN 135 DEG W OR W/O CHAMFER) |
| MATERIAL | ALUMINUM ALLOY OVERALL |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | RIVET, SOLID, COUNTERSUNK 100 DEG, PRECISION HEAD, ALUMINUM AND TITANIUM COLUMBIUM ALLOY |
| SHANK DIAMETER | 0.093 INCHES MINIMUM AND 0.097 INCHES MAXIMUM |
| SHANK STYLE | STRAIGHT W/RADIUS CHAMFERED TIP |
| SPECIAL FEATURES | MS20426HAS BEEN REPLACED BY NASM20426 DATED AUGUST 18,1998 |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-A-8625, TY II, CLASS 1, DICHROMATE SEAL MIL STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | ANODIZE OVERALL |