NFPA Cylinder Mounting Styles MX0 No mount ME3 Square tapped head cap mount ME4 Square tapped blind cap mount ME5 Rectangular head cap through-hole mount ME6 Rectangular blind cap through-hole mount MF1 Rectangular through-hole flange mount, head cap end MF2 Rectangular through-hole flange mount, blind cap end MF5 Square through-hole flange mount, head cap end MF6 Square through-hole flange mount, blind cap end MP1 Integral clevis mount MP2 Detachable clevis mount MP4 Detachable pivot mount MP5 Integral pivot mount MS1 Detachable foot mount MS2 Side lug foot mount MS3 Side lug center mount MS4 Tapped caps flush mount MS7 Lugged foot mount MT1 Head cap trunnion mount MT2 Blind cap trunnion mount MT4 Center trunnion mount MX1 Extended tie rods, both ends MX2 Extended tie rods, blind cap end MX3 Extended tie rods, head cap end MDX Double rod