What is the part number for the spool for the CMCST910? Wilson October 03, 2020 20:01 The spool cap is item number CMZST120SC. Related articles Does the CMMT99436 operate in cw and ccw? what is the accuracy? Why is the line continuing to feed out on my model number CMCST910M1? Comments 0 comments Please sign in to leave a comment.