Speedmaster Internal Allen Head Pipe Plug NPT Black Anodized

The Speedmaster Internal Allen Head Pipe Plug is an NPT (National Pipe Taper) threaded plug. It seals unused ports, bosses and fittings in engine, fluid and plumbing applications. It is also known as a hex socket pipe plug or Allen pipe plug. The internal Allen drive lets you install it with a standard hex key or Allen wrench.

Key Features:

• Internal Allen (hex socket) head: A low-profile drive that you tighten with a hex key. It has no protruding square or hex head.
• NPT tapered threads: The threads are designed to wedge tight as the plug is tightened. This creates a secure seal when used with a suitable thread sealant.
• Performance-oriented design: Made by Speedmaster, a name known for engine and performance components for racing and street builds.
• Multiple thread sizes: The product line covers a range of NPT thread sizes. Choose the size that matches the port you need to plug.

Use these plugs to block off unused ports on cylinder heads, intake manifolds, water pumps, oil galleries and similar components. They are also suited to custom fabrication, plumbing and fluid system projects. For best results, apply a pipe thread sealant compatible with your application and tighten to a suitable torque without over-tightening.