Pipe Plug - 1/8 (100)

The Pipe Plug - 1/8 (100) by Pioneer is the go-to bulk solution for mechanics and automotive technicians who need reliable threaded port closure during engine work, system assembly, or component testing. Whether you're rebuilding a hydraulic line, capping off unused passages in a custom fuel system, or sealing ports during transmission servicing, these brass plugs prevent fluid loss, contamination, and air leaks where they matter most. A 100-count box ensures you have spares on hand for multiple jobs without frequent reordering.

Engineered from durable brass construction, the 1/8 inch NPT (National Pipe Thread) male configuration delivers a tight, leak-proof seal when installed into standard female threaded ports found on engine blocks, intake manifolds, oil galleries, and aftermarket performance components. The tapered thread design creates a mechanical wedge as you tighten, eliminating the need for sealant tape on most automotive applications while remaining compatible with PTFE tape or pipe thread compound for critical high-pressure systems. This proven design withstands vibration, thermal cycling, and exposure to oil, coolant, and fuel without degradation.

Professional mechanics building or modifying engine bays—from turbo installations to engine swaps—rely on bulk packs like this for rapid assembly without delays. The lightweight, compact storage footprint (under 0.7 lbs for 100 pieces) fits easily in toolboxes or shop cabinets. Compatible with any NPT 1/8 female threaded opening, these plugs work across domestic and import vehicles, diesel and gasoline powerplants, and both OEM restoration and custom fabrication projects. Keep a box on hand for emergency port sealing, prototype testing, or scheduled maintenance workflows.