a school bus seat comprises a pin having a cross - sectional shape selected from the group consisting of a pentagon , a hexagon , a heptagon and an octagon . first and second brackets include an aperture selected correspondingly from the group consisting of a pentagon , a hexagon , a heptagon and an octagon . first and second supports include an aperture selected correspondingly from the group consisting of a pentagon , a hexagon , a heptagon and an octagon . the apertures in the brackets and supports are formed in a fiber reinforced polymer such that the apertures are devoid of knit lines . the pins reside in the apertures of the supports and brackets inhibiting rotation of the brackets with respect to the supports . a seat back is secured to the brackets .