PM-MM: Material master details required for Spare Parts

Dear Experts,

I'm new to PM.

I would like to know what the minimum data are that needs to be maintained in material master record for each spare parts. My client has the spare parts procurement scenario where they order material from outside for maintenance orders.

1. Which view of material master need to be maintained for each material(spare part)?

2. Which are the important fields in each of these view which should be mandatorily maintained for external procurement to work?

Please advise.

Thank you very much.

Cheers,

Mahesh