Check the listing for details. Fast Fix 3/8" Air Hose Assembly Repair Fitting - 1/4" MNPT Fixed. Condition: New. Listed at 12.31 USD. The Fast Fix 3/8" Air Hose Assembly Repair Fitting with a 1/4" MNPT Fixed connector – your ultimate solution for air hose repairs in Manufacturing, Automotive, and Construction Industries. When your 3/8" air hose is damaged or leaking, this fitting provides a swift and permanent fix. Swift and Permanent Repairs: Engineered with precision and designed with a fixed configuration, this repair fitting ensures a secure and airtight connection, eliminating the need for costly hose replacements and minimizing downtime. You can quickly and confidently get back to work, knowing your air tools will deliver peak performance. Built to Last: Crafted with heavy-duty brass construction, this repair fitting is built for durability and long-term use.