Hex Flange O-Ring Seal Nuts

Hex Flange O-Ring Seal Nuts, typically in accordance with DIN 6923 / ISO 4161 / ASME B18.16.4, feature an “O” ring positioned in a groove on the underside of the nut – designed to provide 360° sealing protection against the elements.

These components ensure contaminants are unable to enter an application whilst preventing matter such as air and water from escaping. The O-ring can be supplied in various materials to offer different physical, chemical and mechanical properties. This includes the likes of Silicone rubber, Nitrile rubber (Buna-N), Fluorosilicone, EPDM, Viton, and many more.

Hex Flange O-Ring Seal Nuts arrive pre-assembled and ready to use, operating the same as conventional flanged hex nuts. During installation with a standard spanner, wrench or hex socket, the O-ring is compressed between the groove and mating surface whilst ensuring metal on metal contact for a tight and secure seal.

They are often selected for high pressure or contamination-free environments – widely utilised in the aerospace, medical, and food industry as a result. Other uses include within military equipment, as well as applications with the strictest sealing requirements.

Typically manufactured from A2 / 304 Stainless Steel and A4 / 316 Stainless Steel, Hex Flange O-Ring Seal Nuts are available with a smooth or serrated flange, where the additional serrations create a locking mechanism that increases vibration resistance.

Hex Flange O-Ring Seal Nuts are tailor made to meet your requirements – manufactured to order in a wide range of sizes, materials and finishes. Minimum order quantities apply.

Fastenright supply various types of Sealing Fasteners suitable for the most demanding applications and assemblies.