When a requirement is vague, suppliers fill the gaps with their own assumptions. The quotes that come back are hard to compare, and the wrong item can still arrive at the end.
A good enquiry states the item and its application, the relevant standard or grade, dimensions and tolerances, quantity, packaging, any preferred or excluded origins and brands, the delivery point and the date it is needed. Drawings, photographs and nameplate details help enormously for replacement items.
It also helps to say what matters most: lowest price, fastest delivery or a particular quality level. With that, a sourcing partner can present options you can compare like for like.