Zoro Select Buna-N O-Ring 1.5mm × 30mm PK100

Precision sealing rings for metric assemblies

These Buna-N O-rings measure 30 mm inside diameter with a 1.5 mm cross-section and come in a pack of 100. They suit maintenance technicians and engineers who need a ready supply of metric-sized seals for hydraulic or pneumatic fittings. The medium-hard 70A durometer resists extrusion in moderate-pressure systems.

Simple press-fit installation with metric tolerances

Each ring slides into a 33 mm groove without tools, but the tight metric fit demands clean, burr-free surfaces to avoid nicking the 1.5 mm section during assembly. Lubricant compatible with Buna-N prevents rolling or twisting on insertion. The material is not X-ray detectable, so automated inspection lines that rely on radiography will not register these seals.

Stable dimensions across a wide temperature span

The compound remains functional from -40 to 250 degrees F, retaining elasticity during long soak periods rather than hardening after brief heat spikes. Buna-N resists petroleum-based fluids, yet it is not FDA compliant, so food or pharmaceutical circuits must use alternative materials. Metal-detectable additive aids contamination control in processing plants.