--- product_id: 712249248 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: "$221.70" currency: USD in_stock: true reviews_count: 5 category: "Busy Corner" url: https://www.desertcart.us/products/712249248-busy-corner-4c-4782-seal-o-ring-kit-nitrile-90 store_origin: US region: United States of America --- # Heavy-duty organized storage case 90 Durometer heat & wear resistant 580 pcs premium NBR 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:** $221.70 **Availability:** ✅ In Stock ## Summary > 🔧 Seal your success with the ultimate O-ring arsenal! ## 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?** $221.70 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/712249248-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 refunds—confidence in every seal you install. - • **Organized & Portable:** Heavy-duty storage case with labeled compartments keeps your O-rings sorted and ready for any job. - • **Versatile Compatibility:** Perfectly fits SAE, ORFS, and Caterpillar hydraulic hose fittings, ensuring seamless repairs on the go. - • **Comprehensive 580-Piece Kit:** A vast selection of 32 CAT OEM O-ring sizes to cover every hydraulic hose fitting need. - • **Premium Buna-N 90D Material:** Engineered for extreme durability with heat, oil, UV, and wear resistance—built to last under pressure. ## Overview The BUSY-CORNER 4C-4782 Seal O-Ring Kit offers 580 high-quality Buna-N 90 Durometer O-rings in 32 CAT OEM sizes, designed for hydraulic hose fittings including SAE and ORFS standards. Housed in a durable, organized case, this kit delivers exceptional heat, oil, UV, and wear resistance, making it an essential, reliable solution for professional-grade repairs and maintenance. ## Description BUSY-CORNER 4C-4782 270-1528 O-ring Assortment Kit Fits CAT Caterpillar Ø SPECIFICATIONS:20 pieces each for CAT part number 4J7533,7J0204,4J5477,6V8397,6V8398,7J9108,6V9746,5K9090,6V8400,8T0315,3J7354,1J9671,3J1907,3K0360,2M9780,3D2824,4K1388,7M8485,2S40786K6307,304606,4J5140,4J526715 pieces each for CAT part number 4J0519,4J0520,4J0521,4J0522,4J0523,4J052410 pieces each for CAT part number 4J0525,4J0526,4J0527Total 580pcs, packed in a plastic storage case with label to identify sizesØ WIDE APPLICATION4C-4782(2701528) Seal oring kit use for sae stor & orfs fittings,code 61/62 flange O-Rings,Caterpillar hydraulic hose fitting oring. Review: A cost effective kit to keep on my service truck. Has gotten me out of a bind several times. Review: 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. ## 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 | | ASIN | B08PNJT4V5 | | Brand Name | BUSY-CORNER | | Color | Black | | Customer Reviews | 4.6 4.6 out of 5 stars (119) | | Customer reviews | 4.6 4.6 out of 5 stars (119) | | Date First Available | 21 August 2024 | | Item model number | 4C-4782 2701528 | | Manufacturer | BUSY-CORNER | | Manufacturer | BUSY-CORNER | | Material Type | Synthetic Rubber | | Model | 4C-4782 2701528 | | Number of Pieces | 580 | | Part Number | 4C-4782 2701528 | | Product Dimensions | 35 x 29 x 4.5 cm; 1.15 kg | | Set Name | 4C-4782 Seal O-Ring Kit | | Temperature Range | -4E+1 Degrees Celsius | | UPC | 791715982971 | | Unit Count | 1 Count | ## 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 ### ⭐⭐⭐⭐⭐ Review *by T***S on 21 September 2025* A cost effective kit to keep on my service truck. Has gotten me out of a bind several times. ### ⭐⭐⭐⭐⭐ Review *by H***H on 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. ### ⭐⭐⭐ Review *by C***G on 17 August 2025* Limited selection ## Frequently Bought Together - BUSY-CORNER 4C-4782 Seal O-Ring Kit, Nitrile 90, Hydraulic Hose Fitting Orings, Fits CAT Caterpillar Excavator 2701528 4C4782 Replacement - BUSY-CORNER 4C-4784 Print D-Ring Kit, Nitrile 90, Hydraulic Hose Fitting Drings, Fits CAT Caterpillar Excavator 2701535 4C4784 Replacement - BUSY-CORNER 4C-8253 Seal O-Ring Kit, Silicone 90, Hydraulic Hose Fitting Orings, Fits CAT Caterpillar Excavator 2701533 4C8253 Replacement --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/712249248-busy-corner-4c-4782-seal-o-ring-kit-nitrile-90](https://www.desertcart.us/products/712249248-busy-corner-4c-4782-seal-o-ring-kit-nitrile-90) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-08*