How to call the part/good between OK part and NOK part?
Is there a professional word for a part/good that its measure can not reach the OK data but not so bad to be a NOK part? For example only about 0.01 mm. In Chinese we call them 可疑品, but I don't know how to say it in English.

Thanks!

Question

How to call the part/good between OK part and NOK part?
Is there a professional word for a part/good that its measure can not reach the OK data but not so bad to be a NOK part? For example only about 0.01 mm. In Chinese we call them 可疑品, but I don't know how to say it in English.

Thanks!

Answer

In that context, no. Usually parts are either OK, or Not OK. 
For clothing, and other items that can have cosmetic (slight visual）defects, they are sometimes sold as 'seconds' -i.e. second-grade goods.