This high-quality matte finish FKM O-ring adopts premium fluorine rubber raw material and special matte surface treatment craft, different from glossy ordinary FKM rings. The matte surface effectively reduces friction coefficient during reciprocating motion, avoids slipping and twisting, and enhances fitting stability with metal grooves. Produced by precision vacuum secondary vulcanization, the product features ultra-low compression set, smooth uniform matte texture without burrs or bubbles. It works steadily at -20℃ to 230℃, outstandingly resistant to fuel, hydraulic oil, strong acid & alkali, ozone and UV aging, hardly swelling or cracking under harsh corrosive conditions. Widely used in auto fuel systems, BLT hydraulic pile drivers, excavator cylinders, chemical pipeline valves and high-temperature industrial equipment. Full AS568 and metric standard sizes in stock; custom hardness, color and dimensions are supported with flexible MOQ for samples and bulk wholesale orders.











