Danfoss Waltech DIN 2353 Walform Nut + Vit Seal M20S-SS - WF-M20S V-1.4571 20mm Outside Diameter, Hydraulic DIN 2353 Compression Fitting, WALform Nut and Seal, Heavy Duty, Viton, 316 Stainless Steel, Danfoss Waltech GBP 23.99 1