Buna-N O-Ring 5/16 Inch ID x 7/16 Inch OD for Hydraulic and Equipment Applications

Description

When you’re out in the field and notice hydraulic fluid pooling under your tractor or pressure dropping in your loader, the culprit is often a tiny O-ring that’s given up the ghost. These small but mighty seals keep everything from hydraulic fittings to fuel connections tight and leak-free. This 5/16″ x 7/16″ O-ring is one of the most common sizes you’ll find on farm equipment, and having a pack on hand means you won’t be stuck waiting for parts when something starts dripping.

What You’re Getting

• Ten precision-sized O-rings that fit snug where they should
• 70 durometer Buna-N rubber that handles hydraulic fluid, fuel, and most chemicals
• Standard 1/16″ cross-section that works in typical farm equipment grooves
• Quality construction that maintains its seal under pressure and temperature swings
• Convenient 10-pack so you’ll have spares when the next seal decides to quit

Built for Real Farm Work

These O-rings show up everywhere on tractors, combines, and implements—hydraulic cylinder ports, fuel filter housings, hydraulic quick-couplers, and transmission fittings. Whether you’re working on a loader bucket cylinder, replacing fuel filters, or fixing a leaky hydraulic connection, this size fits countless applications across different brands and models of farm equipment.

Made to Last

Farm equipment puts seals through the wringer with temperature changes, chemical exposure, and constant pressure cycles. This Buna-N compound is specifically chosen because it stays flexible in cold weather, resists swelling from hydraulic fluids, and holds up to the heat generated by working systems. The 70 durometer rating gives you the right balance of flexibility for sealing and firmness for durability.

Installation Notes

Keep the old O-ring as a size reference and clean the groove thoroughly before installing the new one. A light coat of hydraulic fluid helps the O-ring slide into place without nicking or twisting. If you’re working on hydraulic fittings, remember that the threads don’t do the sealing—the O-ring does, so don’t over-tighten and damage the groove.