The Milton 1/4 NPT female coupler plug is designed for seamless compatibility with all manufacturers adhering to military specification MIL-C-4109. This M-style coupler features a 1/4" thread size, ensuring a secure connection for various air hose applications. Constructed with durable brass bodies and sleeves, along with case-hardened steel plugs, this fitting offers exceptional strength and longevity, making it ideal for industrial and automotive environments. Ensure your air systems operate efficiently with this reliable coupler plug.