---
product_id: 17977210
title: "Bung Cap 2\" with 3/4\" Knock Out Combo 2pc (1 Buttress Thread & 1 NPT Thread) Fits Plastic 15, 30, 55 Gallon Drum,"
brand: "green goods"
price: "R$176"
currency: BRL
in_stock: true
reviews_count: 9
category: "Green Goods"
url: https://www.desertcart.com.br/products/17977210-bung-cap-2-with-3-4-knock-out-combo-2pc
store_origin: BR
region: Brazil
---

# Dual-thread design: Buttress & NPT Fits 15, 30 & 55-gallon US plastic drums Durable plastic resists heat & weather Bung Cap 2" with 3/4" Knock Out Combo 2pc (1 Buttress Thread & 1 NPT Thread) Fits Plastic 15, 30, 55 Gallon Drum,

**Brand:** green goods
**Price:** R$176
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal Smart, Store Confidently — The Ultimate Drum Cap Duo

## Quick Answers

- **What is this?** Bung Cap 2" with 3/4" Knock Out Combo 2pc (1 Buttress Thread & 1 NPT Thread) Fits Plastic 15, 30, 55 Gallon Drum, by green goods
- **How much does it cost?** R$176 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/17977210-bung-cap-2-with-3-4-knock-out-combo-2pc)

## Best For

- green goods enthusiasts

## Why This Product

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

## Key Features

- • **Dual-Thread Innovation:** Includes both buttress and NPT threads in one combo pack, cutting your labor and inventory costs in half.
- • **Universal Fit, Zero Hassle:** Seamlessly compatible with most US-made 15, 30, and 55-gallon plastic drums—no more guessing or returns.
- • **Built to Brave the Elements:** Crafted from premium plastic engineered to withstand high heat and severe weather—your drums stay sealed come rain or shine.
- • **Certified Leak-Proof Assurance:** UN certified for safety and leak prevention, ensuring your contents remain secure during storage and transport.
- • **Compact & Lightweight Efficiency:** At just 3.5 ounces and slim dimensions, these caps are easy to handle and store without bulk.

## Overview

This 2-inch bung cap combo pack features one buttress thread and one NPT thread cap, designed to fit US-made 15, 30, and 55-gallon plastic drums. Made from durable plastic resistant to heat and harsh weather, these UN-certified caps ensure leak-proof, long-lasting performance while reducing labor and material costs.

## Description

These Greed Goods bung caps with ¾” knockout are extremely versatile and compatible with most US made 15g, 30g, and 55g drums. All caps are certified for use in UN certified drums to ensuring that you get the best quality product with no leakage. It can withstand high resistance to heat and severe weather conditions. Perfect for any emergency storage or transport, this bung cap offers long life as well as reduced labor and material costs!

Review: These fit and sealed my blue Greif 55 gal. poly barrel - Purchased these Bung Cap 2" with 3/4" Knock Out Combo 2pc (1 Buttress Thread & 1 NPT Thread) for my closed top blue poly 55 gal. drum. They came with one "fine thread" (NPT) and one "coarse thread" (buttress) bung cap. The brand name on my blue poly 55 gal. drum is "Greif" and it is made by US Plastic Corp. These 2" caps fit on the barrel great! The do not leak and come with new gaskets that seal correctly! They are just as described and seem to be quality replacement caps for my 55 gal. barrel. Being almost $5 apiece seemed a little steep, compared to other caps available on desertcart, but then I only had to buy two and not a large quantity. Few of the options for purchase of bung caps had the option of both thread sizes available with one purchase. So, since they fit and I didn't have to buy a large quantity of one thread size, the price is just "OK" in my opinion! If they were $1-$2 less expensive, it would not hurt my feelings at all though! If they also could be purchased in a quantity of 2 to 3 caps each, in both thread sizes, I would have probably purchased them.
Review: Good replacement - Good replacement for the price. Fits well in our 55 gal drum.

## Features

- Top-Quality Material: Constructed with durable plastic, ensuring resistance to high heat and severe weather conditions
- Versatile Compatibility: Ideal for most US-made 15g, 30g, and 55g drums, providing a perfect fit for various plastic drum sizes
- Certified for Safety: Approved for use in UN certified drums, ensuring no leakage and maintaining the best quality
- Efficient Design: Features both buttress and NPT threads, reducing labor and material costs while offering long-lasting performance

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B014JNFOWW |
| Age Range (Description) | Kid |
| Battery Description | Likely uses battery, but type not specified |
| Best Sellers Rank | #29,586 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #60 in Drum & Pail Handling Equipment |
| Customer Reviews | 4.6 4.6 out of 5 stars (720) |
| Display Type | digital |
| Form Factor | Cap |
| Is Discontinued By Manufacturer | No |
| Item Weight | 3.52 ounces |
| Item model number | PPA-57-B-5,PPNPS |
| Manufacturer | Drums, Totes & Accessories |
| Material | Plastic |
| Package Dimensions | 6.77 x 4.57 x 1.57 inches |
| Power Source | Battery Powered |
| UPC | 637262982357 |

## Images

![Bung Cap 2" with 3/4" Knock Out Combo 2pc (1 Buttress Thread & 1 NPT Thread) Fits Plastic 15, 30, 55 Gallon Drum, - Image 1](https://m.media-amazon.com/images/I/51+oVTOa-KL.jpg)

## Questions & Answers

**Q: I am measuring my current (broken)  cap to be 2.75 inches- I assume that means this 2 inch cap will not fit?**
A: The threaded portion is about  2-1/4" diameter and the top of the cap is 2-7/8" Diameter.  The 2" refers to the clear passage of a pipe attached to the threaded portion.

**Q: Is the 3/4 knock out threaded on bung cap?**
A: Yes, 3/4 NPT, but the hole needs to be opened by drilling or cutting.

**Q: what is this bung cap made of?**
A: Our bung caps are... Plastic is Polypropylene (PP).  Gaskets are EPDM.  Thank you for your interest in our products.  Poly Farm LLC

**Q: do you carry just the washers?**
A: No sorry.

## Customer Reviews

### ⭐⭐⭐⭐⭐ These fit and sealed my blue Greif 55 gal. poly barrel
*by J***A on November 25, 2025*

Purchased these Bung Cap 2" with 3/4" Knock Out Combo 2pc (1 Buttress Thread & 1 NPT Thread) for my closed top blue poly 55 gal. drum. They came with one "fine thread" (NPT) and one "coarse thread" (buttress) bung cap. The brand name on my blue poly 55 gal. drum is "Greif" and it is made by US Plastic Corp. These 2" caps fit on the barrel great! The do not leak and come with new gaskets that seal correctly! They are just as described and seem to be quality replacement caps for my 55 gal. barrel. Being almost $5 apiece seemed a little steep, compared to other caps available on Amazon, but then I only had to buy two and not a large quantity. Few of the options for purchase of bung caps had the option of both thread sizes available with one purchase. So, since they fit and I didn't have to buy a large quantity of one thread size, the price is just "OK" in my opinion! If they were $1-$2 less expensive, it would not hurt my feelings at all though! If they also could be purchased in a quantity of 2 to 3 caps each, in both thread sizes, I would have probably purchased them.

### ⭐⭐⭐⭐⭐ Good replacement
*by V***T on July 3, 2025*

Good replacement for the price. Fits well in our 55 gal drum.

### ⭐⭐⭐⭐⭐ Good Replacement Drum Caps/Plugs.
*by J***. on July 4, 2025*

Works great in my plastic 55 gallon drum. The fine thread cap was very hard to screw in. I thought I had it cross-threaded and removed it a couple of times to verify it wasn't cross-threading. I haven't checked the 3/4 inch threads but will soon. No issues installing the other cap/plug.

## Frequently Bought Together

- Bung Cap 2" with 3/4" Knock Out Combo 2pc (1 Buttress Thread & 1 NPT Thread) Fits Plastic 15, 30, 55 Gallon Drum,
- WINTOWIN Aluminum Drum Wrench, Drum Plug Bung Wrench for Opening 10 15 20 30 50 55 Gallon Drum, Fits 2 in and 3/4 in Bung Caps
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**Shop now:** [https://www.desertcart.com.br/products/17977210-bung-cap-2-with-3-4-knock-out-combo-2pc](https://www.desertcart.com.br/products/17977210-bung-cap-2-with-3-4-knock-out-combo-2pc)

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-28*