Used on mb-8 air compressor. metric dimensions: external threads 38.1mm-11-12.7mm; internal threads 12.7mm-14 N1 outside hexagon or octagon (partial or full thread optional)
Used on 2320-01-354-3385; truck, family of medium tactical vehicle. cadmium or zinc surface treated N1 outside hexagon or octagon (partial or full thread optional)