Zoro Select Square Profile Buna-N O-Ring Dash 136 PK25

Zoro Select Buna-N Square O-Ring

This pack contains twenty-five square-profile O-rings made from Buna-N rubber with a 70A durometer rating. They are designed for static sealing applications that require a rectangular cross-section and medium-hard material. The dash 136 size provides a nominal inside diameter of two inches and a nominal width of three thirty-seconds of an inch. These seals suit maintenance technicians and engineers who need reliable inch-series hardware.

Temperature Range and Material Stability

The Buna-N compound operates continuously from minus forty degrees to two hundred fifty degrees Fahrenheit. This range covers typical hydraulic fluid, lubricating oil and water-glycol systems without hardening or excessive swell. The medium-hard 70A durometer resists extrusion under moderate pressure while maintaining enough compliance to seat against machined grooves. No special cooling or lubrication beyond the system fluid is required during normal service.

Metal-Detectable Design for Process Safety

Each ring is metal detectable but not X-ray detectable, supporting foreign-object detection lines in food-adjacent or pharmaceutical environments where magnetic separators are used. The black colour provides visual contrast during installation and inspection. Actual dimensions measure 1.9 inches inside diameter, 2.193 inches outside diameter and 0.103 inches width, matching standard dash 136 groove specifications. The pack of twenty-five supports scheduled replacement intervals and reduces reorder frequency.