5-Pack FKM75 Rubber O-Ring Seals - AS568A Standard 5.3x1.8mm Black Gaskets

Alright, let's talk about these little lifesavers - FKM75 rubber O-rings that are perfect for all sorts of sealing jobs. This pack gives you 5 identical O-rings with an outer diameter of 8.8mm, inner diameter of 5.3mm, and wire diameter of 1.8mm. They meet AS568A standards, which is the industry benchmark for O-ring sizes. The FKM75 material (that's fluoroelastomer for you tech folks) is seriously durable - it resists oil, gas, water, and holds up well under pressure. The hardness is Shore A 75, with tensile strength of 12 Mpa and elongation rate of 250%. These things can handle some heat too - they're rated for temperatures up to 200°C for oil resistance and 175°C for hot air aging. The brittle temperature is -25°C, so they won't get stiff in colder conditions. Installation is pretty straightforward - just make sure you use tools without sharp edges and don't stretch the O-ring too much. It's important to check that the surfaces you're sealing are smooth, chamfered properly, and free of burrs before installation. A little lubrication helps them slide into place without twisting. These are perfect for car engine systems, transmissions, shock absorbers, or any plumbing, hydraulic, or air connections where you need to prevent leaks. The black color is standard, and the package includes 5 identical seals. Storage is simple - keep them at temperatures between 0-28°C with humidity under 80%, away from direct sunlight and chemicals. The tolerance standards are tight - +/-0.12mm for inner diameter and +/-0.07mm for wire diameter, so you know you're getting consistent quality. Whether you're a professional mechanic or a DIY enthusiast, having these on hand can save you from leaks and headaches down the road. They're small, lightweight, and easy to store in your toolbox until you need them. The material composition ensures they won't degrade quickly when exposed to automotive fluids or environmental conditions. Many users appreciate how these create reliable seals in high-pressure applications without compromising over time.