Black FDA Buna-N 50 O-rings - Food Grade for the Food Processing Industry
These Buna-N rubber O-rings comply with Paragraph 177.2600 of Title 21, sub-paragraphs a) through d), Code of Federal Regulations, "Rubber Articles Intended for Repeated Use". It should be noted that the Food and Drug Administration does not actually approve any rubber compounds. Rather it publishes a list of permissible ingredients and the maximum allowable concentration of each. Buna-N, also known as nitrile, o-ring is common and the simplest types of seal with an excellent sealing property and durability.