The New R-4 series of Neoprene mounts has a fully encapsulated metal base and top plate (tapped M12) for exposed applications. The initial range is for up to 700 or 1000 Kg loading but 1400 and 1800 Kg mounts will be on-stream shortly.
Nominal (optimal) loading is based on 6mm deflection. Further models are being introduced to cover a wider range of loadings. Alternative female thread forms may be possible also