The half-noble (three shillings and four pence = 40 pence) and, two years later, the quarter-noble of one shilling and eight pence (20 pence) were also issued. These new coins were of the correct weight for the values assigned to them.
Both definitions of AFE refer to money a business or other organization spends, but that is where the similarity ends. An authorization for expenditure must be followed up by an actual cost accounting, as a project may come in under or over the authorized budget.
SAE is an abbreviation for Society of Automotive (formerly Automobile) Engineers. SAE when referring to tools means that the tools follow the standard measurements set by the SAE. 1/2 9/16etc. Not that the tool is approved or endorsed by the SAE. So yes, it only pertains to American measurement tools.