1pc M28 M30 M28*1.5 M28x1.5 M30*1.5 M30x1.5 Pg1.5 12.9 Grade Carbon Steel Pipe Oil Line Plug Throat Tap Hexagon Socket Set Screw - Screws - AliExpress
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
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Radiator valve straight ICMA 771 for Thermostatic head (M28x1.5), for Adapter ICMA 90/100 (M24x1.5) | Balkanenergy.net