Originally Posted by zman

Wrong, you do get MQM's on NW flight numbers (as you do with ALL Sky Miles Partners) per below fare classes
Cabin Fare Class MQM Formula

First or Business P, J, C, Z, F 500 x 1.5
Coach/Economy Y, B 500 x 1.5
Coach/Economy I, M, H, Q, V, S, K, T, L 500 x 1
500 mile minimum