حلقات O-ring من Viton FKM 0.139" CS × 3.859" ID | AS568-241 | داش 241 | صلابة 90 (30 / عبوة)

The 90 durometer is noticeably stiffer than my standard Buna-N rings, which is exactly what I needed for a high-pressure hydraulic fitting. They seated perfectly in the groove without any twisting, and the package of 30 will last me through several rebuilds.

These handled the 400°F heat cycle in my compressor rebuild kit without any swelling. For the price, getting 30 precision-cut FKM o-rings is a solid deal for industrial repairs.

The inner diameter measured exactly to spec on all 30, which made fitting them onto our flanges a breeze. They've held up through repeated steam cycles right up to the 400°F limit without any hardening or cracking.