T.O. 1-1A-9 TABLE 3-17.  GENERAL RIVET (ALUM) IDENTIFICATION CHART (CONT'D) HEAD AND SUPERSEDING NUMERICAL HEAT OLD AN STD MS STD FORM MATERIAL IDENT CODE CONDITION TREAT AN426 MS20426 Countersunk 1100 A-Plain F No 100 5056 B-Raised F No Cross 2117 AD-Dimple T-4 No 2017 D-Raised T-4 Yes Dot 2024 DD-Raised T-4 Yes Dashes Note:  See Paragraph 3-44 for heat treat data. AN427 MS20427 Countersunk 1006/ Recessed A No 100 1010 Triangle Copper C-None A No 302/304 F-Recessed A No Monel M Dash M-None AN430 MS20470 Round Head Replaced by universal See AN470 + MS20470 AN435 MS20435 Round Head 1006 Head Ident A No Solid Recessed Triangle Note:  Listed for Reference only. Copper C-None A No 302/304 F-Head A No Ident None Monel M-None AN441 Use MS20435 See AN435 AN442 Use MS20470 See AN70+ MS20470 AN450 MS20450 Countersunk 1006/ Blank/ A No & oval 1010/ None tubular 1015 Note Listed for Reference only. Copper C-None A No 2117 AD-None T-4 No Brass B-None Grade No B MONEL M-None A No AN455 MS20471 Brazier Head See Solid Superseded AN470 by Universal 3-40