These durable steel swivel plugs are essential for any compressed air system. Machined to exacting standards with 1/4" NPT male and female threads, they form a reliable seal to stop airflow where needed. The integrated swivel design allows for easy installation into tight spaces without straining hoses or fittings. Made of corrosion resistant steel, they can withstand high pressure air and harsh conditions in industrial and automotive workshops. 4 plugs arrives packaged in package to always have a spare on hand for unexpected leaks or repairs. Their compact size makes them easy to store yet tough enough for continuous use capping air lines.