SAE J1691™ APR2026 establishes guidance for plastic motor vehicle safety glazing, including nominal tolerances for thickness, flatness, curvature, size, and fabrication details. It covers injection-molded, extruded, formed, and cell-cast plastic glazing, with technical information on commercial thickness tolerances, dimensional control, checking gauges, drilled holes, edge finishing, markings, and material properties for polycarbonate and acrylic glazing.
This revision updates publication references in Sections 2.2.1 and 2.2.2 and supersedes SAE J1691 APR2019. The document is intended for body engineers, automotive designers, glazing manufacturers, and other professionals involved in the design and production of motor vehicle safety glazing.
Application Scope: Plastic safety glazing for motor vehicles and motor vehicle equipment, including flat and curved injection-molded, extruded, formed, and cell-cast parts.
