STERLING SEAL SUPPLY 144-7470-NJ0005 Lamons Buna Nitrile Od 756995051175 Ring Buna/nitrile 70A Durometer 2-1/2 2-11/16

( Brand: Sterling Seal Supply ), ( Manufacturer Part Number: 144-7470-NJ0005 ), ( Part Type: Ring ), ( UPC: 756995051175 ), ( Unit Count: 5.0 Count ), ( Material Type: Nitrile Rubber ), ( Color: Black ), ( Nominal Inside Diameter: 63.17 Millimeters ), ( Item Diameter: 2.69 Inches ), ( Nominal Outside Diameter: 2.62 Millimeters )

Review STERLING SEAL SUPPLY Lamons 144 Buna/nitrile O ring 70a Durometer Black 2-1/2 Inch Id 2-11/16 Od

The **Sterling Seal Supply 144-7470-NJ0005 Lamons 144 Buna/Nitrile O-Ring** is a precision-engineered sealing solution designed for demanding industrial applications where reliability and performance under pressure are critical. Crafted from **Buna-N (Nitrile) rubber**, this o-ring delivers exceptional resistance to oils, fuels, hydraulic fluids, and many solvents, making it an ideal choice for automotive, aerospace, and heavy machinery systems where chemical compatibility is essential. With a **70A durometer**, this o-ring strikes an optimal balance between flexibility and durability, ensuring a secure seal while maintaining resilience against wear, abrasion, and temperature fluctuations typically operating effectively within a range of **-40 F to 250 F (-40 C to 121 C)**. The **2-1/2" (2.5") to 2-11/16" (2.6875") outer diameter (OD)** dimension allows for precise fitment in a variety of applications, including hydraulic cylinders, pumps, compressors, and fluid power systems where a tight, leak-proof seal is required. Its **Lamons 144 series** designation indicates a high-quality, precision-molded design with consistent cross-sectional dimensions, minimizing the risk of deformation or premature failure under cyclic loading. Whether used in automotive brake systems, aircraft hydraulic lines, or industrial fluid transfer equipment, this o-ring ensures long-term performance by maintaining its integrity under repeated compression and expansion. Built to meet stringent industry standards, it provides a cost-effective yet robust sealing solution for engineers and maintenance professionals who demand precision, durability, and chemical resistance in their critical applications.

### **Pros and Cons of buying a Sterling Seal Supply 144-7470-NJ0005 (Lamons 144 Buna/Nitrile O-Ring, 70A Durometer, 2-1/2" OD, 2-11/16" ID)**

1. **Material Compatibility** The Buna/Nitrile (NBR) compound is widely used for oil, fuel, hydraulic fluids, and many industrial applications, making it versatile for automotive, machinery, and general sealing needs.

2. **Durability and Resistance** Nitrile rubber has good resistance to abrasion, chemicals, and moderate temperatures (typically -40 F to 250 F), which is suitable for many mechanical and hydraulic systems.

3. **Standard Sizing** The 2-1/2" OD and 2-11/16" ID dimensions are common in industrial applications, making it easier to find compatible housings, shafts, or gaskets if needed.

4. **Brand Reputation** Sterling Seal Supply is a well-known supplier of industrial seals, suggesting reliable quality control and availability of technical support.

5. **Cost-Effective Alternative** Compared to specialty elastomers (e.g., Viton or silicone), nitrile is often more affordable while still providing strong performance in many environments.

6. **Easy Replacement** If the original equipment manufacturer (OEM) used a similar or identical seal, this can be a direct drop-in replacement, reducing downtime.

7. **Wide Availability** As a standard part number, it is likely stocked by multiple distributors, ensuring quick reordering if needed.

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1. **Limited Temperature Range** While nitrile handles moderate temperatures well, prolonged exposure to extreme heat (above 250 F) or cold (below -40 F) can degrade performance or cause brittleness.

2. **Chemical Sensitivity** Nitrile is not resistant to strong acids, ketones, esters, or aromatic hydrocarbons. If the application involves these substances, a different elastomer (e.g., Viton, EPDM, or fluorocarbon) may be required.

3. **Potential Swelling in Fuels** Some fuels (e.g., ethanol-blended gasoline) can cause nitrile seals to swell, leading to leaks or premature failure. This depends on the specific fuel composition.

4. **Aging Over Time** Like all rubber compounds, nitrile can dry out or crack over extended periods, especially if exposed to UV light or ozone.

5. **Potential for Compatibility Issues** If the application involves dynamic sealing (e.g., rotating or reciprocating motion), the seal s lip design and material must be verified to prevent wear or leakage.

6. **Sourcing Dependence** While widely available, supply chain disruptions (e.g., global shortages) could temporarily limit availability, especially for niche applications.

7. **No Guarantee of OEM Equivalence** Even if the dimensions match, the exact compound formulation may differ from the OEM s version, potentially affecting performance in critical applications.

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The **Sterling Seal Supply 144-7470-NJ0005 (Lamons 144 Buna/Nitrile O-Ring)** is a **practical and cost-effective choice** for general-purpose sealing applications where the environment is not extreme (e.g., automotive, hydraulic systems, machinery lubrication). Its **versatility, durability, and standard sizing** make it a reliable option for many users. However, **careful consideration of the application s chemical exposure, temperature range, and mechanical stresses** is essential to avoid premature failure.

If the application involves **high temperatures, aggressive chemicals, or dynamic sealing under heavy loads**, a **specialty elastomer (e.g., Viton, EPDM, or fluorocarbon)** may be necessary despite a higher cost. Always verify compatibility with the specific fluids, temperatures, and operating conditions before finalizing the purchase.

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- You need a **general-purpose, oil- and fuel-resistant** seal for moderate temperatures.

- The application is **static or low-motion** (e.g., a hydraulic cylinder or automotive engine seal).

- You require a **standard-sized, widely available** part with a proven track record.

- The environment involves **extreme temperatures, strong chemicals, or ozone exposure**.

- The seal is for **high-speed or high-pressure dynamic applications** where wear resistance is critical.

- The fluid compatibility is **uncertain** (e.g., exposure to ketones, esters, or aromatic solvents).

For **critical applications**, consult the manufacturer s material data sheets or a sealing specialist to confirm compatibility. If possible, test a sample under operating conditions before full-scale deployment.

Details:

Fast Delivery. Lamons 144 Buna/Nitrile O-Ring, 70A Durometer, Black, 2-1/2 ID, 2-11/16 OD, 3/32 width Pack of 5:: Made Buna-nitrile also called Buna-N for use with a variety fluids and hydrocarbons, Temperature Range: 35 C 31 F to 120 248 F ; Shelf-life: 15 Years, These versatile o-rings perform well in petroleum based oils fuels, alphabetic vegetable oils, silicone greases, ethylene glycol, dilute acids, water below 100 212 F, Durometer hardness resistance penetration, O-ring Size meets standards defined by AS568A b ID Nominal: CS Shipping.

part #: 1447470nj0005 prices

• $9.11-$64.68

specifications radiocontrolother:

• brand: Sterling Seal Supply
• mpn: 144-7470-nj0005
• part type: Ring
• upc: 756995051175
• unit count: 5.0 Count
• material type: Nitrile Rubber
• color: Black
• nominal inside diameter: 63.17 Millimeters
• item diameter: 2.69 Inches
• nominal outside diameter: 2.62 Millimeters

payments radiocontrolother:

• credit card: Visa
• wallet: Paypal
• other

returns radiocontrolother:

• policy: No Returns

offer radiocontrolother:

• started: May 6, 2026
• quantity: 1
• options: Ship-to-home
• sold: 0
• availability: In Stock

seller radiocontrolother:

• # reviews: 3516
• city: Miami, Florida
• rating: 99.9%

shipping radiocontrolother:

• cost: $0.00
• transit: 3-8 Days
• type: Fixed
• class: Expedited
• service: Expedited

general radiocontrolother:

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