Clearance Square Head Plugs NPT
Mouse Over to Zoom
Click to Enlarge

SEAFITSquare Head Plugs NPT

Prices from $4.29 - To $69.99
Clearance Pricing on select items - save up to 82%


In stock online.
Model # 1859867 | Mfg # 139701UPC # 642688280840
Brass 1/8" NPT Plug


4.9 Stars


Product Overview

These plugs are designed to seal and close off the ends of pipe runs or seal fitting ports.

The brass fittings are for above-the-waterline use only. 1/8" and 1/4"dia. plugs are offered in both brass and bronze. Due to the difference in nobility between brass and bronze, which can result in galvanic corrosion (and a failure of the fitting), we recommend that you not use these alloys together in saltwater environments.

To avoid this potentially hazardous situation, make sure you are not setting up the conditions for galvanic corrosion by connecting dissimilar brass fittings to bronze fittings. Generally, you can tell them apart just by looking at them. Bronze fittings have an outer surface that is rough in feel and appearance, almost like it’s covered with sand. That’s because bronze fittings are sand cast, and then machined.

Square Head Plugs

These machined brass  or sand cast bronze fittings feature a square head and standard male pipe threads. Threads are tapered "NPT", which stands for "National Pipe Thread."

 WARNING: Cancer and Reproductive Harm -


The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.

Related West Advisor Articles


Product Q & A