Flanged Fittings come in a variety of materials and head styles making them an optimal choice for standard 1/4-28 or M6 Flat-Bottom ports. Most of our Flanged Fittings are made of highly versatile Delrin and they are manufactured to resists cross threading or loosening during use because of their dimensional stability. We also offer the Fittings in TEFZEL (ETFE) which is ideal for use in chemically aggressive environments. It includes a compatible stainless steel washer. Brochure