---
product_id: 426976826
title: "Busy-Corner 4C-4782 Seal O-Ring Kit,Nitrile 90 Durometer,580pcs,Hydraulic Hose Fitting Orings, Fits CAT Caterpiller Excavator 2701528 4C4782 Replacement"
brand: "busy-corner"
price: "€ 70.30"
currency: EUR
in_stock: true
reviews_count: 5
url: https://www.desertcart.pt/products/426976826-busy-corner-4c-4782-seal-o-ring-kit-nitrile-90
store_origin: PT
region: Portugal
---

# 32 CAT OEM sizes in organized case 90 Durometer heat & wear resistant 580 pcs premium O-rings Busy-Corner 4C-4782 Seal O-Ring Kit,Nitrile 90 Durometer,580pcs,Hydraulic Hose Fitting Orings, Fits CAT Caterpiller Excavator 2701528 4C4782 Replacement

**Brand:** busy-corner
**Price:** € 70.30
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal your success with the ultimate CAT O-ring kit — don’t let downtime slow you down!

## Quick Answers

- **What is this?** Busy-Corner 4C-4782 Seal O-Ring Kit,Nitrile 90 Durometer,580pcs,Hydraulic Hose Fitting Orings, Fits CAT Caterpiller Excavator 2701528 4C4782 Replacement by busy-corner
- **How much does it cost?** € 70.30 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/426976826-busy-corner-4c-4782-seal-o-ring-kit-nitrile-90)

## Best For

- busy-corner enthusiasts

## Why This Product

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

## Key Features

- • **Risk-Free Purchase:** Backed by hassle-free returns and full refund policy for total peace of mind.
- • **Unmatched Durability:** Crafted from Buna-N 90D material for superior heat, oil, UV, and wear resistance under high pressure.
- • **Versatile Size Range:** Includes 32 different CAT OEM part numbers to cover nearly every hydraulic hose fitting need.
- • **Effortless Organization:** Heavy-duty storage case with labeled compartments ensures quick selection and on-the-go convenience.
- • **Complete Hydraulic Seal Solution:** 580 precision Nitrile O-rings tailored for CAT excavators and hydraulic fittings.

## Overview

The Busy-Corner 4C-4782 Seal O-Ring Kit offers 580 high-quality Nitrile (Buna-N 90D) O-rings in 32 CAT OEM sizes, engineered for exceptional heat, oil, UV, and wear resistance. Designed for hydraulic hose fittings on Caterpillar excavators, this kit comes in a durable, labeled storage case for easy access and organization, making it an essential upgrade for professionals demanding reliability and efficiency.

## Description

BUSY-CORNER 4C-4782 270-1528 O-ring Assortment Kit Fits CAT Caterpillar Ø SPECIFICATIONS: 20 pieces each for CAT part number 4J7533,7J0204,4J5477,6V8397,6V8398,7J9108,6V9746, 5K9090,6V8400,8T0315,3J7354,1J9671,3J1907,3K0360,2M9780,3D2824,4K1388,7M8485,2S4078 6K6307,304606,4J5140,4J5267 15 pieces each for CAT part number 4J0519,4J0520,4J0521,4J0522,4J0523,4J0524 10 pieces each for CAT part number 4J0525,4J0526,4J0527 Total 580pcs, packed in a plastic storage case with label to identify sizes Ø WIDE APPLICATION 4C-4782(2701528) Seal oring kit use for sae stor & orfs fittings,code 61/62 flange O-Rings,Caterpillar hydraulic hose fitting oring.

## Features

- High Quality:Made of Buna-N 90D (NBR) material,are durable,high temperature resistance,anti static,oil resistant,UV resistance,heat resistant,wear resistant,exceptionally suited for high pressure applications.
- Multi Size:You can get a good selection of 32 different CAT OEM part numbers oring in this kit,can meet almost all your needs.
- Wide Application:This Kit use for sae stor & orfs fittings,code 61/62 flange O-Rings,Caterpillar hydraulic hose fitting oring.
- Handy Packing: Comes with a heavy duty storage case that keeps each size o rings separated and organized,that makes more convenient to carry, select and collect.
- Customer Service: You are unhappy for any reason, return your kit with no questions asked and we will provide a full refund.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Asin | B08PNJT4V5 |
| Best Sellers Rank | 212,352 in Business, Industry & Science (See Top 100 in Business, Industry & Science) 870 in O-Rings |
| Brand | BUSY-CORNER |
| Colour | Black |
| Country Of Origin | China |
| Customer Reviews | 4.6 4.6 out of 5 stars (132) 4.6 out of 5 stars |
| Manufacturer | BUSY-CORNER |
| Manufacturer Part Number | 4C-4782 2701528 |
| Material | Synthetic Rubber |
| Model Number | 4C-4782 2701528 |
| Number Of Items | 580 |
| Number Of Packs | 1 |
| Number Of Pieces | 580 |
| Set Name | 4C-4782 Seal O-Ring Kit |
| Temperature Range | -4E+1 Degrees Celsius |
| Unit Count | 1.0 count |
| Upc | 791715982971 |

## Product Details

- **Brand:** BUSY-CORNER
- **Colour:** Black
- **Material:** Synthetic Rubber
- **Temperature range:** -4E+1 Degrees Celsius
- **UPC:** 791715982971

## Images

![Busy-Corner 4C-4782 Seal O-Ring Kit,Nitrile 90 Durometer,580pcs,Hydraulic Hose Fitting Orings, Fits CAT Caterpiller Excavator 2701528 4C4782 Replacement - Image 1](https://m.media-amazon.com/images/I/81y2mempuwL.jpg)
![Busy-Corner 4C-4782 Seal O-Ring Kit,Nitrile 90 Durometer,580pcs,Hydraulic Hose Fitting Orings, Fits CAT Caterpiller Excavator 2701528 4C4782 Replacement - Image 2](https://m.media-amazon.com/images/I/712YKvjMQHL.jpg)
![Busy-Corner 4C-4782 Seal O-Ring Kit,Nitrile 90 Durometer,580pcs,Hydraulic Hose Fitting Orings, Fits CAT Caterpiller Excavator 2701528 4C4782 Replacement - Image 3](https://m.media-amazon.com/images/I/81O0Ie9cL0L.jpg)
![Busy-Corner 4C-4782 Seal O-Ring Kit,Nitrile 90 Durometer,580pcs,Hydraulic Hose Fitting Orings, Fits CAT Caterpiller Excavator 2701528 4C4782 Replacement - Image 4](https://m.media-amazon.com/images/I/81UmoWI6beL.jpg)
![Busy-Corner 4C-4782 Seal O-Ring Kit,Nitrile 90 Durometer,580pcs,Hydraulic Hose Fitting Orings, Fits CAT Caterpiller Excavator 2701528 4C4782 Replacement - Image 5](https://m.media-amazon.com/images/I/61TLQfk5duL.jpg)

## Questions & Answers

**Q: Are these actual cat seals?**
A: It Is not a cat box but you would never tell the o rings apart from the genuine - perhaps they are made at the same factory..

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worth the price
*by  on Reviewed in the United States 13 January 2026*

Nice cat aftermarket replacement, has the cat numbers on it so you can refill it easily at cat

### ⭐⭐⭐⭐⭐ Good value
*by  on Reviewed in Canada 6 August 2024*

Looks to be a good complete oring kit. Orfs, orb, flange orings. Only thing that would make the kit be better is the compartments had labels on style & size.

### ⭐⭐⭐⭐⭐ A real good kit
*by  on Reviewed in the United States 21 September 2025*

A cost effective kit to keep on my service truck. Has gotten me out of a bind several times.

## Frequently Bought Together

- BUSY-CORNER 4C-4782 Seal O-Ring Kit, Nitrile 90, Hydraulic Hose Fitting Orings, Fits CAT Caterpillar Excavator 2701528 4C4782 Replacement
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- BUSY-CORNER 4C-8253 Seal O-Ring Kit, Silicone 90, Hydraulic Hose Fitting Orings, Fits CAT Caterpillar Excavator 2701533 4C8253 Replacement

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**Shop now:** [https://www.desertcart.pt/products/426976826-busy-corner-4c-4782-seal-o-ring-kit-nitrile-90](https://www.desertcart.pt/products/426976826-busy-corner-4c-4782-seal-o-ring-kit-nitrile-90)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-09-09*