RUBBER DYNAMICS BN700100-012 Buna Ring Od Pack 70A 3/8 1/2 1/16

( Brand: Rubber Dynamics ), ( Manufacturer Part Number: BN700100-012 ), ( Part Type: Ring ), ( Unit Count: 100.0 Count ), ( Material Type: Nitrile Rubber ), ( Color: Black ), ( Temperature Range: 30f To 250f Degrees Fahrenheit ), ( Nominal Inside Diameter: 0.38 Inches ), ( Nominal Outside Diameter: 0.5 Inches )

Review RUBBER DYNAMICS 012 Buna n O ring 70a Hardness Black 3/8 Inch Id 1/2 Od 1/16 Width Pack Of

The **Rubber Dynamics BN700100-012 Buna-N O-Ring (70A Durometer, 3/8" OD x 1/2" ID x 1/16" Cross Section)** is a high-performance sealing solution engineered for precision applications requiring reliable, long-lasting performance in demanding environments. Crafted from **Buna-N (Nitrile) rubber**, this O-ring delivers exceptional resistance to a wide range of fluids, including oils, fuels, hydraulic fluids, and many solvents, making it an ideal choice for automotive, industrial, and mechanical systems where chemical exposure is a concern. With a **70A durometer hardness**, this O-ring strikes an optimal balance between flexibility and durability, ensuring a tight, consistent seal while maintaining resilience against compression set and wear over extended use. The **3/8-inch outer diameter (OD)** and **1/2-inch inner diameter (ID)** dimensions, combined with a **1/16-inch cross-section**, provide precise sizing for standard shaft or bore applications, reducing the risk of leakage while accommodating minor assembly tolerances. Packaged in a **single-unit format (1/16 pack)**, this O-ring is conveniently sized for quick installation in equipment requiring a compact yet robust sealing solution. Whether used in hydraulic systems, pneumatic fittings, or automotive components, this Buna-N O-ring ensures reliable performance under pressure, temperature fluctuations, and exposure to aggressive substances, making it a trusted component for engineers and technicians seeking dependable sealing performance.

### **Pros and Cons of buying a Rubber Dynamics BN700100-012 (Buna-N O-Ring, 70A, 3/8" OD, 1/16" CS, Pack of 12)**

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. **Temperature Resistance** The 70A durometer rating provides a balance of flexibility and strength, allowing it to perform well in moderate temperature ranges (typically -20 F to 200 F/-29 C to 93 C).

3. **Precision Dimensions** The 3/8" outer diameter (OD) and 1/16" cross-section (CS) are standard measurements, ensuring compatibility with many OEM and aftermarket applications.

4. **Pack of 12 Convenience** Buying in bulk reduces the need for frequent reorders and can be cost-effective for maintenance or repair projects.

5. **Brand Reputation** Rubber Dynamics is a well-known supplier of high-quality seals and gaskets, often preferred over generic or low-cost alternatives.

6. **Compatibility with Common Fluids** Buna-N is widely used in automotive systems (e.g., brake lines, fuel lines) and hydraulic applications due to its resistance to petroleum-based fluids.

7. **Easy to Install** Standard size makes it straightforward to fit without requiring specialized tools or modifications.

1. **Limited Chemical Resistance** While Buna-N resists oils and fuels, it may degrade when exposed to ozone, oxygen, or certain solvents (e.g., aromatic hydrocarbons) over time.

2. **Temperature Limitations** Prolonged exposure to extreme heat (above 200 F/93 C) or cold (below -20 F/-29 C) can reduce performance and lifespan.

3. **Potential for Swelling or Hardening** Prolonged contact with incompatible fluids (e.g., some esters or ketones) can cause dimensional changes, affecting sealing effectiveness.

4. **Cost Compared to Alternatives** While not excessively expensive, Buna-N O-rings may be pricier than lower-grade or generic options, especially when buying in small quantities.

5. **Stock Availability Issues** Specialty sizes or materials may have limited availability, requiring advance ordering or potential delays.

6. **Not Ideal for High-Pressure Applications** While suitable for moderate pressures, extreme pressure can lead to premature failure if the O-ring is not properly lubricated or installed.

7. **Environmental Exposure Risks** Outdoor or UV-exposed applications may require additional protection, as Buna-N can degrade from sunlight or weathering over time.

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### **Conclusion**

The **Rubber Dynamics BN700100-012 Buna-N O-ring** is a reliable, high-performance option for applications requiring resistance to oils, fuels, and moderate temperatures. Its standard size and bulk packaging make it a practical choice for automotive, hydraulic, and industrial use. However, its limitations in extreme temperatures, certain chemicals, and long-term environmental exposure must be considered before purchase.

If your application involves **petroleum-based fluids, moderate temperatures, and standard sealing needs**, this O-ring is an excellent choice. For **high-temperature, chemical-resistant, or extreme-pressure applications**, alternative materials (e.g., Viton, EPDM, or silicone) may be more suitable.

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### **Recommendation**

- You need a durable, oil-resistant seal for automotive (brake/fuel lines), hydraulic, or general mechanical applications.

- Your environment operates within the temperature range of **-20 F to 200 F (-29 C to 93 C)**.

- You require a standard size (3/8" OD, 1/16" CS) and prefer bulk purchasing for cost efficiency.

- Your application involves **aromatic solvents, high heat, or extreme cold** (e.g., Viton for better chemical resistance or EPDM for broader temperature ranges).

- You need **long-term outdoor exposure** (consider UV-resistant coatings or different materials).

- Budget constraints allow for **lower-cost generic O-rings** (though quality may vary).

For most general-purpose sealing needs, this O-ring is a **solid, trustworthy purchase** from a reputable brand. Always verify compatibility with your specific fluids and operating conditions before installation.

Details:

012 Buna-N O-Ring, 70A Hardness, Black, 3/8 ID, 1/2 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. Fast Delivery. Barometer hardness of 70A for resistance to penetration, Complies with Aerospace Standard AS568A. 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 #: bn700100012 prices

• $6.99-$75.55

specifications radiocontrolother:

• brand: Rubber Dynamics
• mpn: Bn700100-012
• part type: Ring
• unit count: 100.0 Count
• material type: Nitrile Rubber
• color: Black
• temperature range: 30f To 250f Degrees Fahrenheit
• nominal inside diameter: 0.38 Inches
• nominal outside diameter: 0.5 Inches

returns radiocontrolother:

• policy: No Returns

seller radiocontrolother:

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

shipping radiocontrolother:

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

payments radiocontrolother:

• wallet: Google-pay
• credit card: Mastercard
• other

general radiocontrolother:

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

offer radiocontrolother:

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

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