---
product_id: 305068865
title: "20pc 1/4\" NPT Plug Fitting Set - Carbon Steel Male Thread Internal Allen Head Pipe Plugs"
brand: "mardatt"
price: "€ 19.02"
currency: EUR
in_stock: true
reviews_count: 13
category: "Mardatt"
url: https://www.desertcart.hr/products/305068865-20pc-1-4-npt-plug-fitting-set-carbon-steel-male
store_origin: HR
region: Croatia
---

# 20-piece set for versatile use Quick, wrench-friendly installation Carbon steel for high strength & durability 20pc 1/4" NPT Plug Fitting Set - Carbon Steel Male Thread Internal Allen Head Pipe Plugs

**Brand:** mardatt
**Price:** € 19.02
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal it like a pro—secure, strong, and ready to plug the gap!

## Quick Answers

- **What is this?** 20pc 1/4" NPT Plug Fitting Set - Carbon Steel Male Thread Internal Allen Head Pipe Plugs by mardatt
- **How much does it cost?** € 19.02 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/305068865-20pc-1-4-npt-plug-fitting-set-carbon-steel-male)

## Best For

- mardatt enthusiasts

## Why This Product

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

## Key Features

- • **Complete 20-Piece Set:** Everything you need in one compact kit—ready for any project.
- • **Leak-Proof Performance:** Ideal for sealing air, gas, and fluid lines under pressure—no welding required.
- • **Effortless Installation:** Hex-drive socket design lets you install or remove plugs quickly with minimal tools.
- • **Premium Carbon Steel Build:** Engineered for toughness and rust resistance to last through harsh conditions.
- • **Precision 1/4" NPT Threading:** Guaranteed American Standard Pipe Taper Thread compatibility for a perfect fit every time.

## Overview

This 20-piece 1/4" NPT plug fitting set features durable carbon steel construction with rust-resistant oil finish, designed for high-pressure sealing in industrial and mechanical applications. Each plug offers precise American Standard Pipe Taper threading and a hex-drive socket for fast, reliable installation without welding. Perfect for preventing leaks in engines, oil tanks, and fluid systems, this kit delivers professional-grade performance and convenience.

## Description

♞Mardatt NPT Plug Pipe Plug Fitting Carbon Steel Male Thread Internal Allen Head Pipe Plug Set 【Specification】 ★NPT Size: 1/4" NPT ★Material: Carbon Steel ★Color: Black 【Key Fetures】 ●Premium Material-Made of high quality carbon steel, high strength, good toughness, strong enough for for a long term usage. ●Multiple Sizes Available- Our NPT plugs are available in a range of standardized thread sizes. When you need an aid to prevent leakage of air, gases, fluids under pressure quickly and conveniently, turn to this plug. ●Easy to use-These plugs feature hex-drive socket which makes it space-saving and convenient for installing by hand or a wrench. Easy put up and remove. Widely used in every field of industry. 【Package Included】 20 x 1/4" NPT Plug 【Warm Tips】 - We recommend that you can use a sealant (tape or paste) to aid in sealing and apply sealant to male thread only.

Review: Worked out good and a good assortment! Would definitely buy again. - Good material and a good assortment. No complaints at all and have a decent storage container to keep them all together.
Review: Great value - Needed a plug for my Edelbrock intake and always needing pipe plugs so I ordered this kit. Tremendous value for a variety of sizes of plugs. Very happy with them.

## Features

- 【WHAT'S IN THE PACKAGE】 --- This set contains 20 pieces select 1/4" NPT pipe plugs, which is made to comply with NTP thread (American Standard Pipe Taper Thread) . Overall Dimension: 0.51" L x 0.39" H.
- 【HIGH QUALITY NPT PLUGS】--- Manufactured from durable carbon steel, they have high strength and solid construction with rust-resistant oil on the surface. Meanwhile, they are strong enough to use under pressure for long time even in harsh conditions.
- 【SIMPLE INSTALLATION】--- These pipe plugs are external threaded, just tighten with a wrench. Before installation, you can using a sealant (tape or paste) to aid in sealing. They offer secure and durable, good performance.
- 【PRACTICAL HELPER】--- These pipe plugs available in a range of standardized thread sizes. When you need an aid to prevent leakage of air, gases, fluids under pressure quickly and conveniently, turn to this plug. No need for welding, convenient & time-saving.
- 【WIDELY USED】--- These NPT pipe plugs are great for industrial use, widely applying to prevent leakage of gases, oil and fluids in your engine block, oil tank, drain pipe and more.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08NCLLMHQ |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #48,274 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,388 in Pipe Fittings |
| Brand | Mardatt |
| Color | Black |
| Connector Type | Plug |
| Customer Reviews | 4.7 4.7 out of 5 stars (363) |
| Date First Available | November 12, 2020 |
| Exterior Finish | Black |
| Item Package Quantity | 20 |
| Item Weight | 5.5 ounces |
| Item dimensions L x W x H | 0.2 x 0.2 x 0.39 inches |
| Item model number | M-99 |
| Manufacturer | Mardatt |
| Material | Carbon Steel |
| Measurement System | inch |
| Number of Pieces | 20 |
| Part Number | M-99 |
| Product Dimensions | 0.2 x 0.2 x 0.39 inches |
| Shape | plug |
| Size | 1/4 inch NPT |
| Thread Size | 1/4 |
| Thread Type | NPT |
| UPC | 798789765875 |

## Product Details

- **Brand:** Mardatt
- **Color:** Black
- **Connector Type:** Plug
- **Exterior Finish:** Black
- **Item Weight:** 0.16 Kilograms
- **Item dimensions L x W x H:** 0.2 x 0.2 x 0.39 inches
- **Material:** Carbon Steel
- **Size:** 1/4 inch NPT
- **Thread Size:** 1/4
- **Thread Type:** NPT

## Images

![20pc 1/4" NPT Plug Fitting Set - Carbon Steel Male Thread Internal Allen Head Pipe Plugs - Image 1](https://m.media-amazon.com/images/I/51Af4wj6ffL.jpg)
![20pc 1/4" NPT Plug Fitting Set - Carbon Steel Male Thread Internal Allen Head Pipe Plugs - Image 2](https://m.media-amazon.com/images/I/51FeJSjpnQL.jpg)
![20pc 1/4" NPT Plug Fitting Set - Carbon Steel Male Thread Internal Allen Head Pipe Plugs - Image 3](https://m.media-amazon.com/images/I/51MHJtScFpL.jpg)
![20pc 1/4" NPT Plug Fitting Set - Carbon Steel Male Thread Internal Allen Head Pipe Plugs - Image 4](https://m.media-amazon.com/images/I/51OV1jzSAFL.jpg)
![20pc 1/4" NPT Plug Fitting Set - Carbon Steel Male Thread Internal Allen Head Pipe Plugs - Image 5](https://m.media-amazon.com/images/I/51PhBCF1N0L.jpg)

## Available Options

This product comes in different **Size, Item Package Quantity** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worked out good and a good assortment! Would definitely buy again.
*by R***D on December 29, 2025*

Good material and a good assortment. No complaints at all and have a decent storage container to keep them all together.

### ⭐⭐⭐⭐⭐ Great value
*by T***L on December 27, 2024*

Needed a plug for my Edelbrock intake and always needing pipe plugs so I ordered this kit. Tremendous value for a variety of sizes of plugs. Very happy with them.

### ⭐⭐⭐⭐⭐ Nice variety
*by A***. on April 13, 2025*

Used this to cover some of the threaded holes on a intake manifold in a sbc

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.hr/products/305068865-20pc-1-4-npt-plug-fitting-set-carbon-steel-male](https://www.desertcart.hr/products/305068865-20pc-1-4-npt-plug-fitting-set-carbon-steel-male)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-02-24*