---
product_id: 450707580
title: "Thunderfix Close Coupling Washer Doughnut Toilet Cistern"
brand: "thunderfix"
price: "8.16 OMR"
currency: OMR
in_stock: true
url: https://www.desertcart.com.om/products/450707580-thunderfix-close-coupling-washer-doughnut-toilet-cistern
store_origin: OM
region: Oman
---

# Premium rubber seal Durable 20mm thickness Precision 100mm OD Thunderfix Close Coupling Washer Doughnut Toilet Cistern

**Brand:** thunderfix
**Price:** 8.16 OMR
**Availability:** ✅ In Stock

## Summary

> 🚽 Seal the deal with Thunderfix – where precision meets durability!

## Quick Answers

- **What is this?** Thunderfix Close Coupling Washer Doughnut Toilet Cistern by thunderfix
- **How much does it cost?** 8.16 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/450707580-thunderfix-close-coupling-washer-doughnut-toilet-cistern)

## Best For

- thunderfix enthusiasts

## Why This Product

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

## Key Features

- • **Optimal Dimensions:** With a 100mm external diameter and 58mm internal diameter, it guarantees compatibility and performance.
- • **Lightweight Yet Strong:** At just 60 grams, it’s easy to handle without compromising on strength or reliability.
- • **Perfect Fit, Zero Leak:** Engineered to fit standard close coupling toilet kits flawlessly, ensuring a watertight seal every time.
- • **Robust Rubber Resilience:** Crafted from high-quality rubber for long-lasting durability and resistance to wear and tear.
- • **Sleek Flat Washer Design:** Flat head style for easy installation and a clean, professional finish.

## Overview

The Thunderfix Close Coupling Washer Doughnut is a premium rubber flat washer designed specifically for toilet cisterns. Featuring a 100mm external diameter, 58mm internal diameter, and 20mm thickness, it ensures a perfect fit and reliable seal for standard close coupling kits. Lightweight at 60 grams, this durable washer offers easy installation and long-lasting performance, making it an essential upgrade for any modern bathroom setup.

## Description

Close coupling doughnut washer for toilet cisternHigh quality rubber replacementWasher to fit standard close coupling kitExternal Diameter 100mmInternal Diameter 58mmThickness 20mm

## Features

- Brand: Thunderfix
- Material: Rubber
- Fastener Type: Flat Washer

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Thunderfix |
| Part number | 100198 |
| Item Weight | 60 g |
| Manufacturer reference | 100198 |
| Color | white |
| Material | Rubber |
| Item thickness | 20 Millimeters |
| Number Of Pieces | 4 |
| Head Style | Flat |
| Cutting Diameter | 98 Millimeters |
| Item diameter | 98 Millimeters |

## Product Details

- **Material:** Rubber
- **Outside diameter:** 1E+2 Millimeters
- **Washer type:** Flat
- **Fastener size:** 5 mm
- **Item thickness:** 20 Millimeters

## Images

![Thunderfix Close Coupling Washer Doughnut Toilet Cistern - Image 1](https://m.media-amazon.com/images/I/71HM7sjgeIL.jpg)
![Thunderfix Close Coupling Washer Doughnut Toilet Cistern - Image 2](https://m.media-amazon.com/images/I/41kbqnG0geL.jpg)

## Frequently Bought Together

- Close Coupling Washer Doughnut Toilet Cistern
- Close Coupling Washer Doughnut Stepped Type Toilet Cistern WC Repair
- Close Coupling Washer to Suit 2" Outlet Hole Toilet Cistern WC Repair

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**Shop now:** [https://www.desertcart.com.om/products/450707580-thunderfix-close-coupling-washer-doughnut-toilet-cistern](https://www.desertcart.com.om/products/450707580-thunderfix-close-coupling-washer-doughnut-toilet-cistern)

---

*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-02-22*