RUBBER DYNAMICS BN700100-011 Buna Ring Od Pack 70A 5/16 7/16 1/16

( Brand: Rubber Dynamics ), ( Manufacturer Part Number: BN700100-011 ), ( Part Type: Ring ), ( Unit Count: 100.0 Count ), ( Material Type: Nitrile Rubber ), ( Color: Black ), ( Temperature Range: 30f To 250f Degrees Fahrenheit ), ( Nominal Inside Diameter: 0.31 Inches ), ( Nominal Outside Diameter: 0.44 Inches )

Review RUBBER DYNAMICS 011 Buna n O ring 70a Hardness Black 5/16 Inch Id 7/16 Od 1/16 Width Pack

The **Rubber Dynamics BN700100-011 Buna-N O-Ring (70A Durometer, 5/16" to 7/16" OD, 1/16" Cross-Section)** is a precision-engineered sealing solution designed for demanding industrial applications where reliability, chemical resistance, and consistent performance are paramount. Crafted from **Buna-N (Nitrile) rubber**, this o-ring is formulated with a balanced blend of synthetic rubber and plasticizers to deliver exceptional resistance to oils, fuels, hydraulic fluids, and many solvents, making it an ideal choice for automotive, hydraulic, pneumatic, and general machinery systems. With a **70A durometer hardness**, this o-ring strikes an optimal balance between flexibility and durability, ensuring a tight, long-lasting seal that maintains its integrity under moderate to high-pressure conditions while accommodating minor surface irregularities. The **5/16" to 7/16" outer diameter (OD) range** and **1/16" cross-section** provide versatility for fitting into standard bores and grooves commonly found in pumps, valves, cylinders, and connectors, where precise sealing is critical to prevent leaks and contamination. Packaged in a **single-unit format**, this o-ring is ready for immediate installation, reducing downtime and ensuring compatibility with existing assemblies without the need for custom fabrication. Whether used in automotive fuel systems, hydraulic actuators, or industrial fluid transfer applications, this Buna-N o-ring exemplifies the durability and performance expected from high-quality elastomeric seals, offering a cost-effective solution for maintaining system integrity in harsh operating environments.

### **Pros and Cons of buying a Rubber Dynamics BN700100-011 Buna-N O-Ring (70A Durometer, 5/16" to 7/16" OD, 1/16" Cross Section)**

1. **High-Quality Material (Buna-N)** Buna-N (Nitrile) is a durable synthetic rubber known for its resistance to oils, fuels, and many chemicals, making it suitable for automotive, hydraulic, and industrial applications.

2. **Wide Size Range (5/16" to 7/16" OD)** The adjustable tolerance allows for easy fitting in applications where slight variations in bore size exist, reducing the need for custom ordering.

3. **Standardized Durometer (70A)** A 70A hardness provides a good balance between flexibility and strength, making it versatile for sealing applications where moderate compression is required.

4. **Pack of 10** The bulk quantity offers cost savings per unit, which is beneficial for maintenance kits, spare parts, or frequent replacements.

5. **Brand Reputation (Rubber Dynamics)** Rubber Dynamics is a well-known supplier of high-quality seals and gaskets, often preferred in automotive and industrial sectors for reliability.

6. **Compatibility with Common Fluids** Buna-N is resistant to gasoline, diesel, hydraulic fluids, and many lubricants, making it a practical choice for automotive and machinery applications.

7. **Easy to Install** Standard O-ring design ensures straightforward installation with minimal tools required.

8. **Long Shelf Life** Properly stored Buna-N O-rings maintain their properties for extended periods, reducing the risk of premature degradation.

1. **Limited Chemical Resistance** While Buna-N resists many fuels and oils, it may degrade in the presence of strong oxidizers, esters, or aromatic hydrocarbons (e.g., some solvents), which could shorten its lifespan in certain environments.

2. **Temperature Limitations** Buna-N has a typical operating range of **-40 F to 250 F (-40 C to 121 C)**. Extreme heat or cold could cause brittleness or excessive softening, reducing effectiveness.

3. **Potential Swelling in Some Fluids** Prolonged exposure to certain fluids (e.g., vegetable oils, animal fats) may cause the O-ring to swell, leading to leaks or binding.

4. **Requires Proper Lubrication** Dry installation can lead to premature wear; lubrication (e.g., with silicone grease) is often necessary for smooth seating.

5. **Size Tolerance Constraints** While the 5/16" to 7/16" OD range is helpful, applications with very tight tolerances may still require precise measurement to ensure a proper fit.

6. **Cost Compared to Alternatives** For non-critical applications, cheaper O-rings (e.g., Viton or silicone) might be considered, though they may lack the chemical resistance of Buna-N.

7. **Potential for Contamination** If stored improperly (e.g., exposed to sunlight, oils, or dust), the O-rings could degrade before use.

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### **Conclusion**

The **Rubber Dynamics BN700100-011 Buna-N O-ring** is a reliable, versatile choice for sealing applications in automotive, hydraulic, and general industrial settings where resistance to fuels and oils is required. Its adjustable size range, bulk packaging, and brand reputation make it a practical purchase for maintenance or replacement needs. However, its limitations in extreme temperatures, certain chemicals, and the need for proper handling and lubrication must be considered before use.

For most standard automotive or mechanical applications (e.g., engine gaskets, hydraulic systems), this O-ring is an excellent option. If the application involves exposure to harsh chemicals, extreme temperatures, or requires superior chemical resistance (e.g., Viton for fuels and solvents), alternative materials may be more suitable.

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### **Recommendation**

- You need a durable, oil- and fuel-resistant seal for automotive or industrial use.

- The application involves moderate temperatures and standard fluids (gasoline, diesel, hydraulic oil).

- You require a bulk quantity (pack of 10) for cost efficiency or spare parts.

- The size range (5/16" to 7/16" OD) matches your application s tolerances.

- The application involves **extreme temperatures** (above 250 F or below -40 F).

- Exposure to **strong solvents, esters, or oxidizers** is likely (Viton or silicone may be better).

- The budget is tight, and a lower-cost O-ring (e.g., natural rubber) is acceptable for non-critical sealing.

For most users, this O-ring offers a **strong balance of performance, durability, and value**, making it a recommended choice for general sealing needs.

Details:

Fast Delivery. Barometer hardness of 70A for resistance to penetration, Complies with Aerospace Standard AS568A. 011 Buna-N O-Ring, 70A Hardness, Black, 5/16 ID, 7/16 OD, 1/16 width Pack of 100:: Made from Buna-Nitrile Buna-N, suitable for use with various fluids, hydrocarbons, oils, fuels, and hydraulic applications. Suitable for a broad temperature range, from 30 F 34 C to 250 121 C, designed with round cross-section ensure secure seal between overlapping cylindrical surfaces.

part #: bn700100011 prices

• $6.99-$75.55

specifications radiocontrolother:

• brand: Rubber Dynamics
• mpn: Bn700100-011
• part type: Ring
• unit count: 100.0 Count
• material type: Nitrile Rubber
• color: Black
• temperature range: 30f To 250f Degrees Fahrenheit
• nominal inside diameter: 0.31 Inches
• nominal outside diameter: 0.44 Inches

general radiocontrolother:

• Toys Hobbies > Radio Control Control Line > Other RC Control Line
• condition: New

returns radiocontrolother:

• policy: No Returns

shipping radiocontrolother:

• service: Expedited
• transit: 3-9 Days
• class: Expedited
• cost: $0.00
• type: Fixed

payments radiocontrolother:

• credit card: Visa
• wallet: Apple-pay
• other

seller radiocontrolother:

• # reviews: 4662
• city: Miami, Florida
• rating: 99.5%

offer radiocontrolother:

• started: June 2, 2026
• quantity: 1
• availability: In Stock
• sold: 0
• options: Ship-to-home

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