---
product_id: 89823488
title: "Caplugs P-28 P Series Plastic Threaded Plug for Pipe Fittings, HD-PE, To Plug Thread Size 1/4\" NPT, Tapered & Straight, Temporary Seals, Thread Protection, Leak Prevention, Red, Pack of 100 (99390174)"
brand: "caplugs"
price: "545 kr"
currency: DKK
in_stock: true
reviews_count: 3
url: https://www.desertcart.dk/products/89823488-caplugs-p-28-p-series-plastic-threaded-plug-for-pipe
store_origin: DK
region: Denmark
---

# Vibrant red for instant visual identification HD-PE resists acids, bases & solvents Wide temp range: -18°C to 102°C Caplugs P-28 P Series Plastic Threaded Plug for Pipe Fittings, HD-PE, To Plug Thread Size 1/4" NPT, Tapered & Straight, Temporary Seals, Thread Protection, Leak Prevention, Red, Pack of 100 (99390174)

**Brand:** caplugs
**Price:** 545 kr
**Availability:** ✅ In Stock

## Summary

> 🔧 Lock in reliability, seal out uncertainty!

## Quick Answers

- **What is this?** Caplugs P-28 P Series Plastic Threaded Plug for Pipe Fittings, HD-PE, To Plug Thread Size 1/4" NPT, Tapered & Straight, Temporary Seals, Thread Protection, Leak Prevention, Red, Pack of 100 (99390174) by caplugs
- **How much does it cost?** 545 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/89823488-caplugs-p-28-p-series-plastic-threaded-plug-for-pipe)

## Best For

- caplugs enthusiasts

## Why This Product

- Trusted caplugs brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Tailored Fit:** Available in tapered & straight styles, perfectly matching 1/4" NPT threads for precision sealing.
- • **Seal with Confidence:** Protect your pipe threads from dust, moisture, and contaminants effortlessly.
- • **Versatile Industry Use:** Ideal for masking, painting, plating, testing, and maintenance across multiple sectors.
- • **Trusted Quality Assurance:** Backed by Caplugs’ engineering expertise and rigorous quality control for consistent results.
- • **Durability Meets Performance:** Crafted from high-density polyethylene for chemical resistance and long-lasting protection.

## Overview

Caplugs P-28 P Series Plastic Threaded Plugs are high-density polyethylene (HD-PE) protective caps designed to seal 1/4" NPT pipe fittings. Their vibrant red color ensures easy identification while safeguarding internal threads from contaminants during assembly, transport, and maintenance. Resistant to chemicals and extreme temperatures (-18°C to 102°C), these plugs offer durable, temporary sealing solutions trusted across diverse industries.

## Description

Available in tapered and straight styles, Caplugs P Series Plastic Threaded Plugs for NPT/NPS Pipe Fittings are red-colored plugs designed to seal the threaded ends of pipe fittings, protecting the internal threads of the fittings from dust, dirt, debris, moisture and other pollutants. Our P Series plugs can be utilized in a multitude of industries for various processes and applications, such as masking, painting, plating and coating, and for temporary sealing of threaded ends during assembly and testing of pipe fittings, transportation and storage of fittings and during pipe and valve maintenance. Caplugs P Series Plastic Threaded Plugs for NPT/NPS Pipe Fittings are offered in different sizes and six different styles to fit tapered (NPT) and straight (NPS) threads. This specific model (99390174) fits the following thread style and size: NPT 1/4". Caplugs P Series Plastic Threaded Plugs for NPT Pipe Fittings 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. It has a service temperature range of 0° F (-18° C) to 215° F (102° C). 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.

## Features

- P SERIES: Available in tapered and straight styles, Caplugs P Series Plastic Threaded Plugs for NPT/NPS Pipe Fittings are red-colored plugs designed to seal the threaded ends of pipe fittings, protecting the internal threads of the fittings from dust, dirt, debris, moisture and other pollutants
- MULTI-USE: Our P Series plugs can be utilized in a multitude of industries for various processes and applications, such as masking, painting, plating and coating, and for temporary sealing of threaded ends during assembly and testing of pipe fittings, transportation and storage of fittings and during pipe and valve maintenance.
- SEVERAL STYLES AND SIZES: Caplugs P Series Plastic Threaded Plugs for NPT/NPS Pipe Fittings are offered in different sizes and six different styles to fit tapered (NPT) and straight (NPS) threads. This specific model P-28 (99390174) fits the following thread style and size: NPT 1/4"
- STRONG AND DURABLE: Caplugs P Series Plastic Threaded Plugs for NPT Pipe Fittings 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. It has a service temperature range of 0° F (-18° C) to 215° F (102° C).
- 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.

## Product Details

- **Material:** PE-HD
- **Brand:** Caplugs
- **Color:** Red
- **Item Weight:** 0.01 Pounds
- **Number of Items:** 100

## Images

![Caplugs P-28 P Series Plastic Threaded Plug for Pipe Fittings, HD-PE, To Plug Thread Size 1/4" NPT, Tapered & Straight, Temporary Seals, Thread Protection, Leak Prevention, Red, Pack of 100 (99390174) - Image 1](https://m.media-amazon.com/images/I/51NN1CILQ5L.jpg)
![Caplugs P-28 P Series Plastic Threaded Plug for Pipe Fittings, HD-PE, To Plug Thread Size 1/4" NPT, Tapered & Straight, Temporary Seals, Thread Protection, Leak Prevention, Red, Pack of 100 (99390174) - Image 2](https://m.media-amazon.com/images/I/512clXSG7zL.jpg)
![Caplugs P-28 P Series Plastic Threaded Plug for Pipe Fittings, HD-PE, To Plug Thread Size 1/4" NPT, Tapered & Straight, Temporary Seals, Thread Protection, Leak Prevention, Red, Pack of 100 (99390174) - Image 3](https://m.media-amazon.com/images/I/51h8RzRZQIL.jpg)
![Caplugs P-28 P Series Plastic Threaded Plug for Pipe Fittings, HD-PE, To Plug Thread Size 1/4" NPT, Tapered & Straight, Temporary Seals, Thread Protection, Leak Prevention, Red, Pack of 100 (99390174) - Image 4](https://m.media-amazon.com/images/I/61RMri16puL.jpg)
![Caplugs P-28 P Series Plastic Threaded Plug for Pipe Fittings, HD-PE, To Plug Thread Size 1/4" NPT, Tapered & Straight, Temporary Seals, Thread Protection, Leak Prevention, Red, Pack of 100 (99390174) - Image 5](https://m.media-amazon.com/images/I/61zmcODiQZL.jpg)

## Available Options

This product comes in different **Number of Items** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fits a paramount in floor pool cleaning valve cover
*by M***N on July 18, 2022*

I overtightened this plug on my paramount in floor pool cleaning valve cover while trying to stop a leak. This is an exact fit replacement for that part.

### ⭐⭐⭐⭐⭐ Capplugs are used to test  Air
*by V***A on March 15, 2021*

Great Product

### ⭐⭐⭐⭐⭐ GREAT PRODUCT
*by M***N on November 11, 2022*

HARD TO FIND ITEM

## Frequently Bought Together

- Caplugs 99390174 Plastic Threaded Plug for Pipe Fittings. P-28, PE-HD, to Plug Thread Size 1/4 NPT", Red (Pack of 100)
- Caplugs 99390176 Plastic Threaded Plug for Pipe Fittings. P-48, PE-HD, to Plug Thread Size 1/2 NPT", Red (Pack of 50)
- Caplugs 99390175 Plastic Threaded Plug for Pipe Fittings. P-38, PE-HD, to Plug Thread Size 3/8 NPT", Red (Pack of 100)

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-01-28*