Caplugs TH-5 TH Series – Plastic Hex Socket Threaded Plug, 800 Pack, Black HD-PE, NPT Thread Size 3/8"-18, Plug ID 0.31" Low Pressure Testing & In-Plant Processes, Oil & Heat Resistant (QTH51KA1)

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$350.78
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Management number 213574917 Release Date 2026/04/12 List Price $140.31 Model Number 213574917
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Not intended for permanent applications, Caplugs TH Series Hex Socket Threaded Plugs are black-colored plugs that are designed to temporarily protect internal threaded ports during low-pressure testing and in-plant processes by keeping them clean from moisture and other contaminants. These plugs feature a hexagonal design socket, which allows for easy installation and removal. This also makes them more secure and more difficult to tamper with, as hex keys are required to tighten them. For your convenience, our TH Series plugs are available in six different sizes to fit NPT thread sizes ranging from 1/16”-27 to 1”-11-1/2. This particular model plugs NPT Thread Size 3/8"-18. Oil- and heat-resistant to 250° F (121° C), Caplugs TH Series Hex Socket Threaded Plugs are constructed from high-density polyethylene (HD-PE), a lightweight thermoplastic polymer known for its high strength, density and durability. It is exceptionally resistant to a wide range of chemicals, including acids, bases and solvents, as well as resistant to environmental stress cracking and corrosion. Caplugs prides itself on its extensive line of premium products that are suitable for a plethora of industries, from aviation to medical, general manufacturing and everything in-between. At Caplugs, we provide the broadest range of solutions and the highest quality parts right when you need them. Our teams work diligently to ensure consistent results, with more engineers on staff, processes for creative solutions and molding experts for reliable quality.

  • TH SERIES: Not intended for permanent applications, Caplugs TH Series Hex Socket Threaded Plugs are black-colored plugs that are designed to temporarily protect internal threaded ports during low-pressure testing and in-plant processes by keeping them clean from moisture and other contaminants.
  • SECURE AND EASY TO USE: These plugs feature a hexagonal design socket, which allows for easy installation and removal. This also makes them more secure and more difficult to tamper with, as hex keys are required to tighten them.
  • SIX DIFFERENT SIZES: For your convenience, our TH Series plugs are available in six different sizes to fit NPT thread sizes ranging from 1/16”-27 to 1”-11-1/2. This particular model plugs NPT Thread Size 3/8"-18.
  • DENSE AND TOUGH: Oil- and heat-resistant to 250° F (121° C), Caplugs TH Series Hex Socket Threaded Plugs are constructed from high-density polyethylene (HD-PE), a lightweight thermoplastic polymer known for its high strength, density and durability. It is exceptionally resistant to a wide range of chemicals, including acids, bases and solvents, as well as resistant to environmental stress cracking and corrosion.
  • PARTS YOU CAN TRUST: Caplugs prides itself on its extensive line of premium products that are suitable for a plethora of industries, from aviation to medical, general manufacturing and everything in-between. At Caplugs, we provide the broadest range of solutions and the highest quality parts right when you need them. Our teams work diligently to ensure consistent results, with more engineers on staff, processes for creative solutions and molding experts for reliable quality.
Size To plug thread size 3/8-18"
Color Black
Brand Name Caplugs
Unit Count 800.0 Count
Item Weight 4.99 g
Thread Size 0.31 inch
Thread Type NPT
Manufacturer Caplugs Inc.
Model Number QTH51KA1
Material Type High Density Polyethylene
Connector Type Plug
Exterior Finish Black
Item Dimensions 10 x 10 x 14 inches
Number of Pieces 800

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