---
product_id: 37281329
title: "O2 Oxygen Sensor Stepped Mounting Boss Bung M18 x 1.5"
brand: "amaam"
price: "R$131"
currency: BRL
in_stock: true
reviews_count: 8
category: "Amaam"
url: https://www.desertcart.com.br/products/37281329-o2-oxygen-sensor-stepped-mounting-boss-bung-m18-x-1
store_origin: BR
region: Brazil
---

# M18 x 1.5 universal thread Stepped recessed design for easy fit Made from durable mild steel in USA O2 Oxygen Sensor Stepped Mounting Boss Bung M18 x 1.5

**Brand:** amaam
**Price:** R$131
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your ride with precision and durability—because your engine deserves the best!

## Quick Answers

- **What is this?** O2 Oxygen Sensor Stepped Mounting Boss Bung M18 x 1.5 by amaam
- **How much does it cost?** R$131 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/37281329-o2-oxygen-sensor-stepped-mounting-boss-bung-m18-x-1)

## Best For

- amaam enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Crafted from robust mild steel, engineered to withstand years of heat and vibration.
- • **Effortless Installation:** Unique stepped mounting boss with recessed edge simplifies sensor reattachment—no more guesswork.
- • **Universal Precision Fit:** M18 x 1.5 threading ensures seamless compatibility with any exhaust pipe.
- • **Upgrade Your Exhaust Game:** Rejuvenate worn bung holes and eliminate leaks with a professional-grade sensor mount.
- • **Trusted American Craftsmanship:** Proudly made in the USA, guaranteeing quality and reliability for your vehicle.

## Overview

The O2 Oxygen Sensor Stepped Mounting Boss Bung M18 x 1.5 is a premium mild steel fitting designed for universal exhaust pipe applications. Featuring a unique stepped recessed design and standard M18 x 1.5 thread, it enables easy, leak-proof reattachment of oxygen sensors. Made in the USA, this durable mounting boss revitalizes worn bung holes, ensuring a secure, long-lasting fit trusted by automotive professionals.

## Description

Oxygen Sensor Mounting Boss; Universal M18 x 1.5 Thread; Made from Mild Steel; Used for re-attaching O2 Sensor to any universal exhaust pipe application; Recessed design with .08" thick edge makes for easy use when re-attaching; Use with our #107 plug

Review: Until now, my bung hole was rotten and loose... - Until now, my bung hole was rotten and loose. Bung hole leakage was a continuous battle.. Years of agitation and abuse were just too much for it to take. This product was the perfect way to rejuvenate my bung hole to the tight and fresh one it once was. To install, I carefully reamed out my bung hole - I was afraid to make my bung hole too loose so I used a fine graduation stepper bit to slowly widen my bunghole little by little. This fitting then simply slid into my bung hole with slight force and then I very easily tightened by bung hole around it with some weld beads. I’m happy to say that this fitting is now permanently stuck in my bung hole.
Review: Good fit - I had to slightly open the hole on converter then tap it in. Welded in and fit good. Has longer sleeve area it is a benefit.

## Features

- Used for re-attaching O2 Sensor to any universal exhaust pipe application
- Unique stepped design makes for an easy fit
- Standard M18 x 1.5 thread
- Made from mild steel
- Made in USA

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01LDS4GLG |
| Best Sellers Rank | #199,345 in Automotive ( See Top 100 in Automotive ) #808 in Automotive Replacement Oxygen Sensors |
| Brand | AMAAM |
| Customer Reviews | 4.7 4.7 out of 5 stars (175) |
| Date First Available | September 1, 2016 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.634 ounces |
| Item model number | e6d9f366-8b54-41fa-9cff-0cd2f0da81d9 |
| Manufacturer | After Market Auto & More |
| Manufacturer Part Number | 63-50 |
| Material | Alloy Steel |
| Mounting Type | Pipe Mount |
| Output Type | Push-Pull |
| Package Dimensions | 3.86 x 2.32 x 1.38 inches |
| Specific Uses For Product | Oxygen Sensor |
| Style | Unique |

## Product Details

- **Brand:** AMAAM
- **Item Weight:** 0.02 Kilograms
- **Material:** Alloy Steel
- **Mounting Type:** Pipe Mount
- **Style:** Unique

## Images

![O2 Oxygen Sensor Stepped Mounting Boss Bung M18 x 1.5 - Image 1](https://m.media-amazon.com/images/I/617aBCyditL.jpg)
![O2 Oxygen Sensor Stepped Mounting Boss Bung M18 x 1.5 - Image 2](https://m.media-amazon.com/images/I/71TiLMidBEL.jpg)
![O2 Oxygen Sensor Stepped Mounting Boss Bung M18 x 1.5 - Image 3](https://m.media-amazon.com/images/I/71iObs2lgXL.jpg)
![O2 Oxygen Sensor Stepped Mounting Boss Bung M18 x 1.5 - Image 4](https://m.media-amazon.com/images/I/719NL9N5VjL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Until now, my bung hole was rotten and loose...
*by D***N on May 30, 2018*

Until now, my bung hole was rotten and loose. Bung hole leakage was a continuous battle.. Years of agitation and abuse were just too much for it to take. This product was the perfect way to rejuvenate my bung hole to the tight and fresh one it once was. To install, I carefully reamed out my bung hole - I was afraid to make my bung hole too loose so I used a fine graduation stepper bit to slowly widen my bunghole little by little. This fitting then simply slid into my bung hole with slight force and then I very easily tightened by bung hole around it with some weld beads. I’m happy to say that this fitting is now permanently stuck in my bung hole.

### ⭐⭐⭐⭐⭐ Good fit
*by P***R on October 21, 2025*

I had to slightly open the hole on converter then tap it in. Welded in and fit good. Has longer sleeve area it is a benefit.

### ⭐⭐⭐⭐⭐ Great for custom installs and swaps
*by P***E on February 19, 2019*

Worked great. The step helps keep its position and adds some rigidity. Welds easily and takes a good bit of heat, so keep the puddle on the bung vs the pipe. I found it easiest to drill a 1/4” hole, verify center is where you need, them use a step bit to open the pipe up enough to drop in. Since you’re welding a flat step to a rounded pipe, just put a few tack welds onto the edges then run a solid bead to weld the gaps. A second pass makes it look filled in properly and adds rigidity. Don’t forget to use an old O2 sensor or bolt to keep any slag or spatter off the threads (a good coat in antisieze helps too).

## Frequently Bought Together

- O2 Oxygen Sensor Stepped Mounting Boss Bung M18 x 1.5
- J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz
- Walker Products 90-210SS Oxygen Sensor Adapter Bung – 12mm Female to 18mm Male Threads – Stainless Steel, Made in USA

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**Shop now:** [https://www.desertcart.com.br/products/37281329-o2-oxygen-sensor-stepped-mounting-boss-bung-m18-x-1](https://www.desertcart.com.br/products/37281329-o2-oxygen-sensor-stepped-mounting-boss-bung-m18-x-1)

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-22*