7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals

7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals

$5.99 USD
Auf Lager
Outer x Inner x Cross section:

Outer x Inner x Cross section
Quantity:

Quantity
Menge:
COUPON Code：Welcome

Only once, Get 10% off now

Amazon American Express Apple Pay Bancontact Diners Club Discover Google Pay iDEAL Mastercard PayPal Shop Pay USDC Visa

  • Delivery

    Express shipping (1-7 Days)
    Standard shipping: (3-14 Days)

  • Free Return & Exchange

    30-Day Money Back
    Free Exchange & No-Hassle Returns

  • Shipping from US facilities

  • Your purchase makes a difference.
    Your impact: 1 tree will be planted with this purchase.

🔍 Large Diameter 7mm NBR O-Rings for Industrial & Heavy Equipment

Meet the heavy-duty sealing solution for your large-scale projects! Our 7mm Cross Section NBR O-Rings are specifically designed for applications requiring large diameters, with an OD range from 414mm to 754mm. Crafted from premium Nitrile Rubber, these robust seals offer unmatched reliability against oils, fuels, and industrial fluids for large machinery and equipment.

🌟 Perfect for Large Glands: The substantial 7mm cross-section provides excellent stability and sealing force in large-diameter grooves, preventing roll and twist while resisting extrusion under pressure. Ideal for big hydraulic cylinders and industrial flanges.

📋 Technical Specifications for Large 7mm NBR O-Rings

Material Nitrile Rubber (NBR / Buna-N) – Superior resistance to oils, fuels, and hydraulic fluids, perfect for industrial environments.
Cross Section (Thickness) 7mm (0.276") – Heavy-duty profile for large-diameter applications requiring stability and high-pressure resistance.
Outer Diameter (OD) Range 414mm (16.3") to 754mm (29.7") – Specifically sized for large equipment, machinery, and industrial applications.
Hardness (Durometer) Shore 70A – Provides the perfect balance of flexibility for sealing and firmness for installation in large grooves.
Temperature Range -40°F to +248°F (-40°C to +120°C) – Withstands temperature extremes common in outdoor and industrial settings.
Key Features Excellent oil & fuel resistance, superior abrasion resistance, low compression set, reliable sealing for large dynamic and static applications.

🛠️ Primary Applications for Large Diameter 7mm Industrial O-Rings

These large 7mm O-rings are engineered for heavy-duty sealing in demanding, large-scale applications:

  • 🏭 Industrial Machinery: Large hydraulic presses, injection molding machines, industrial pumps, compressor housings, and massive valve flanges.
  • 🚜 Agricultural & Construction Equipment: Tractor main hydraulic cylinders, excavator arm seals, large bore cylinders on loaders and backhoes.
  • 🛢️ Oil & Gas / Fluid Handling: Large pipeline flange connections, filter housings, storage tank lids, and processing equipment seals.
  • 🚗 Heavy-Duty Automotive & Fleet: Large commercial vehicle suspension systems, bus/truck hydraulic systems, and heavy equipment repair.
  • ⚙️ Custom Manufacturing & Prototyping: Perfect for engineers and fabricators building custom machinery or repairing large industrial components.

❓ FAQs About Our Large Diameter 7mm NBR Seals

Why choose a 7mm cross-section for large diameter applications? 🔧

A 7mm cross-section provides critical stability in large diameters. Thinner O-rings can twist or roll in wide grooves during installation or under pressure. The 7mm thickness ensures the seal stays seated, provides a larger sealing surface, and offers greater resistance to extrusion through gaps, which is more pronounced in large assemblies.

How do I install a large 414mm+ O-ring without damaging it? 📏

For large O-ring installation, ensure the groove is clean and free of sharp edges. Use a blunt, rounded tool to guide the O-ring into place. Lubricate with a compatible grease or fluid (like silicone grease) to reduce friction. Stretch it evenly and avoid twisting. For very large diameters, having two people can help distribute the stretch evenly.

Are these large NBR seals suitable for outdoor/weather exposure? ☀️

Yes, within limits. NBR has good resistance to weathering, ozone, and water, making it suitable for outdoor equipment. However, for constant UV/sun exposure, consider a cover. Its excellent temperature range (-40°F to 248°F) handles most climatic conditions for industrial and agricultural machinery.

Can I use these on large flanges with bolt holes? 🔩

Absolutely. These 7mm diameter O-rings are commonly used as static seals on flanged connections. Ensure the groove is designed for an O-ring (with proper depth and width). The O-ring should sit in the groove, and when the flanges are bolted together, it compresses to create a leak-tight seal, even around bolt holes.

Do you ship these large O-rings coiled or in a specific shape? 📦

To ensure they arrive without permanent deformation, our large-diameter O-rings are carefully packaged. They are typically coiled in a large, gentle coil or placed in a protective ring to maintain their shape. Each is individually bagged to prevent contamination. Instructions for relaxing the O-ring before installation are included.