Image Image M-Series ARO Pneumatic Manual Male Threaded Coupler Markets Chemical Processing, Construction, Maintenance Repair Operations (MRO), Mining, Steel Processing Product Options Part Number Length Maximum OD Body Size Thread Thread Size Pipe Thread Material 2MM2-B 2.13" 0.87" 1/4" NPT 1/4" NPT / NPTF Brass 2MM3-B 2.13" 0.87" 1/4" NPT 3/8" NPT / NPTF Brass