Hi Ivonne,
We had a similar requirement. We wanted to sell small consumables that are not stock-controlled with our stock managed items on a Sales Order.
We initially thought an Item Group of "CONS - Spare Part" would work but these Products cannot be sold on a Sales Order, only a Service Order.
We ended up using a Service with a Item Group of "SEFL - Fixed Price without Actuals". For these items you can Confirm Execution directly within the Sales Order without the need to process a separate Service Confirmation and if you use a Labour Resource with no attributed value the value of the service valuation postings made in the General Ledger is zero.
In my opinion, it would be better if SAP allow the sale of "CONS - Spare Part" items on Sales Orders.
Lee