Stone River Products Standard Square Ring Kit, 382 Piece Buna-N NBR 70A Assortment, 30 AS568 Sizes, Black Square Cut Seals for Hydraulic, Automotive & Industrial Use

This Stone River Products Standard Square Ring Kit includes 382 square-section O-rings manufactured from Buna-N 70 (Nitrile) rubber. The assortment contains 30 commonly used sizes to support a range of general sealing applications in automotive, industrial, and maintenance environments. Buna-N 70 material provides resistance to petroleum-based oils, fuels, water, and many standard industrial fluids. Square rings are commonly used in both static and select dynamic sealing applications where a square cross-section is required. Product Features: 382 total square-section O-rings 30 assorted standard sizes Material: Buna-N (Nitrile) 70 durometer Suitable for use with petroleum oils, fuels, water, and many industrial fluids Designed for maintenance, repair, and equipment service applications Applications: Automotive repair and maintenance Pumps, valves, and hydraulic systems Industrial equipment service General mechanical sealing tasks This assortment kit provides multiple sizes in one organized set to support routine repair and replacement needs.

• 382-Piece Square Ring Assortment – 30 AS568 Sizes: Comprehensive kit covering 30 of the most commonly used inch sizes for industrial, automotive, hydraulic, and maintenance applications.
• Square Cross-Section for Stable Sealing: Square cut washer-style rings provide reliable sealing performance and are ideal for face-to-face gasket style sealing or shaft sealing applications.
• Buna-N (NBR) 70 Durometer – Industry Standard: Made from sulfur-cured black nitrile rubber with excellent resistance to petroleum oils, gasoline, propane, hydraulic fluids, and water.
• Wide Operating Temperature Range: Performs from -40°F to +250°F, offering durability in engines, pumps, gearboxes, plumbing systems, and industrial machinery.
• Organized for Fast Access: 382 total pieces arranged in a convenient organizer case, making it ideal for technicians, field service crews, and MRO inventory kits.
• Industrial & Consumer-Ready: Perfect for machinists, automotive service techs, maintenance professionals, and DIY enthusiasts alike. Ideal for use as shaft seals, static face gasket seals, or in linear and rotary motion applications.