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Item #:
1642080
Mastercool (91339) HNBR O-Ring Assortment
Item #:
1642080
LSL 845
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*All items will import from US
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Imported from USA store
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Order now and get it around Monday, September 28
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AUTOMOTIVE R12 & R134a O-RING ASSORTMENT (270 PIECE HNBR) Superior Sealing to Prevent Unwanted Leaks
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What Stands Out
Durable Material
Constructed from HNBR, ensuring strong resistance to oil, heat, and chemicals, making it ideal for various industrial applications.
Comprehensive Assortment
Includes multiple sizes, catering to diverse needs, which reduces downtime by providing the right fit for multiple projects.
Convenient Storage
Packaged in a portable case for organized storage, allowing users to easily transport and access the O-rings when needed, enhancing efficiency.
Product Details
| Brand Name | Mastercool |
| UPC | 700376913392 |
| Manufacturer | Mastercool |
| Unit Count | 1 Count |
| Set Name | O-Ring Assortment |
| Global Trade Identification Number | 00700376913392 |
| Number of Items | 1 |
| Number of Pieces | 270 |
| Part Number | 91339 |
| Item Weight | 4.8 ounces (136.08 grams) |
| Model | 91339 |
| Material Type | Synthetic Rubber |
| Temperature Range | 1.2E+2 u00b0C |
| Nominal Inside Diameter | 7.8 millimeters |
| Item Diameter | 7.8 millimeters |
| Material | Synthetic Rubber |
| Brand | Mastercool |
Who Should Buy?
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HVAC Technicians
Ideal for HVAC professionals needing durable seals for refrigerant lines and fittings, ensuring efficient and leak-free systems.
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Automotive Mechanics
Perfect for mechanics who require reliable O-rings for engine repairs, gaskets, and various fluid-related applications.
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Home DIYers
Great for home improvement enthusiasts looking to complete plumbing or mechanical projects with high-quality, resistant O-rings.
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Heavy Industry
Not suitable for heavy industrial applications where extreme pressure or temperature conditions exceed HNBR capabilities.
Product Description
Mastercool (91339) HNBR O-Ring Assortment
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Customer Questions & Answers
-
Question:
What are the o-rings made of?
Answer: The o-rings are made of HNBR (hydrogenated nitric butadiene) rubber material. -
Question:
How many pieces are included in the assortment?
Answer: The assortment includes 270 pieces with 18 different sizes for a variety of applications. -
Question:
How are the o-rings packaged?
Answer: The o-rings are packaged in a transparent plastic box for convenient and organized storage.
Mastercool Air Conditioning Line Repair Tools Editorial Review
**** The o-ring kit has garnered a mixed reception among customers, highlighting both its strengths and limitations. Many users appreciate the comprehensive range of sizes included in the kit, making it a reliable resource for general repairs. The quality of the o-rings has been commended, with users noting that once installed, they have held up well and provided peace of mind, particularly in critical applications like automotive air conditioning systems. One user emphasized the invaluable nature of having a well-made o-ring set on hand given the potential catastrophic failures that can occur with inferior materials. However, there are notable drawbacks reported by customers, primarily concerning the lack of larger o-rings typically required for compressors. This limitation leads some to advise potential buyers against relying solely on this kit for complete vehicle air conditioning replacements. Users mentioned that while the kit can provide for common projects, it sometimes falls short for specific needs, particularly when it comes to compatible sizes for certain car models. Additionally, despite the convenience of having a kit available, customers shared experiences of the o-rings being either the wrong thickness or dimension for particular automotive applications. A common sentiment among users is that while this kit is a great starting point, it may not suffice for extensive automotive repairs, leading to the recommendation of vehicle-specific kits for dedicated jobs. In summary, while the o-ring kit is valued for its assortment and quality, users are advised to Consider their specific needs before relying on this product for larger projects. **
Customer Reviews & Ratings
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Pros
- Comprehensive range of sizes included in the kit.
- Good quality o-rings that hold up well after installation.
- Provides peace of mind for emergency repairs.
- Useful for a variety of projects beyond automotive use.
Cons
- Missing larger o-rings typically required for compressors.
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Jasmin
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“Great products and very good service: very easy and very fast international delivery.”
9 September 2026 · via Trustpilot
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11 September 2026 · via Trustpilot
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“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
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LSL 845
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Features & Benefits
- Made of HNBR rubber material, resistant to high temperatures, oil, water, and high pressure, providing excellent sealing to prevent unwanted leaks.
- 270 piece assortment with 18 different sizes for a variety of applications.
- Packaged in a transparent plastic box for convenient and organized storage.
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