LD-191 NBR Rubber O-Ring Assortment Set | Wholesale Supplier

The LD-191 NBR Rubber O-Ring Assortment Set is an essential maintenance inventory item for plumbers, automotive technicians, hydraulic mechanics, maintenance departments, and repair shops that regularly need replacement sealing rings for leak prevention and system restoration. Nitrile butadiene rubber (NBR) is the most widely used elastomer for general-purpose sealing applications due to its excellent resistance to petroleum-based oils, fuels, hydraulic fluids, and water, combined with good mechanical strength and abrasion resistance at an economical price point. The 70 Shore A hardness provides an optimal balance between sealing compliance and extrusion resistance, allowing the O-rings to conform to mating surfaces for reliable leak-free seals while resisting being pushed out of grooves under moderate pressure. Each set includes a comprehensive range of 18 to 30 metric sizes covering inner diameters from 3mm to 50mm with cross-sections from 1.5mm to 3.5mm, matching the vast majority of O-ring requirements found in Asian and European equipment. The red plastic organizer case features individual compartments for each size with a clear printed size chart on the inside lid, making it easy to identify and retrieve the correct ring without sorting through mixed bags. A snap-latch closure keeps the case securely closed during transport and storage. Whether sealing leaking plumbing faucets and valves, repairing automotive fuel and oil system connections, maintaining hydraulic cylinders and pumps, servicing pneumatic compressors and tools, or stocking a general repair shop, the LD-191 NBR O-ring assortment set ensures the right seal is always on hand.