{"data":{"id":"us/30-cfr-18.27","jurisdiction":"us","citation":"30 CFR 18.27","heading":"Gaskets.","body":"A gasket(s) shall not be used between any two surfaces forming a flame-arresting path except as follows:\n(a) A gasket of lead, elastomer, or equivalent will be acceptable provided the gasket does not interfere with an acceptable metal-to-metal joint.\n(b) A lead gasket(s) or equivalent will be acceptable between glass and a hard metal to form all or a part of a flame-arresting path.","path":["Title 30—Mineral Resources","CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","SUBCHAPTER B—TESTING, EVALUATION, AND APPROVAL OF MINING PRODUCTS","PART 18—ELECTRIC MOTOR-DRIVEN MINE EQUIPMENT AND ACCESSORIES","Subpart B—Construction and Design Requirements"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-30.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:24Z","sha256":"c37e2e8c94aa130f9c4ed0bd6055a61ebbcde666cff756baf0f08fee7456743c","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-18.26","next":"us/30-cfr-18.28"},"notice":"GroundRules: Original legal text. Not legal advice."}