Zoro Select O-Ring 13/16 in Silicone Red PK25

Application and Purpose

These red silicone O-rings suit food-processing and pharmaceutical equipment that requires FDA-compliant and 3A 18-03 sanitary seals. The metal-detectable material helps quality-control systems spot fragments if a seal fails. Each pack contains twenty-five rings sized to a nominal 13/16 inch inside diameter for standard groove dimensions.

Sustained Load Behaviour

Silicone retains elasticity across a continuous temperature span of -80 to 450 degrees Fahrenheit without hardening or cracking. The medium-hard 50A durometer resists permanent compression set during long clamp cycles and repeated thermal expansion. Metal detectability remains stable throughout the service interval, so inspection sensitivity does not drift over time.

Thermal, Noise and Power Profile

Operating temperature limits are -80 to 450 degrees Fahrenheit, covering cryogenic cleaning and high-heat sterilisation in a single material. The seals add no moving parts, so they generate zero acoustic signature and draw no electrical power. Actual dimensions measure 0.7 inch inside diameter and 0.103 inch cross-section for reliable groove fit.