MAMBA M28x1.5 to 10AN adapter fitting fit with NBR O-ring | eBay
Radiator valve straight ICMA 771 for Thermostatic head (M28x1.5), for Adapter ICMA 90/100 (M24x1.5) | Balkanenergy.net
A5 Accumulator Adaptor - M8x1 | HydraCheck
Adapter HR20 Universal | VARIOUS M28x1,5 (Herz...)
Adaptall 9004-16-28 Series 9004 Carbon Steel Straight Adapter, 1"-11 Male BSPP x M28X1.5 Male Metric, BSPP x Metric, Carbon Steel: Amazon.com: Industrial & Scientific