Walraven Britclips T Bar / Twist On Clip (AC) for Ceiling Grid ( Bag of 25) | AC25Walraven Britclips T Bar Twist On Clip (AC) for Ceiling Grid ( Bag of 25) AC25 Walraven Britclips T Bar Twist On Clip (AC) for fixing to the ceiling grid with stud bolt M6 (length see table) for fixing of clamp, conduit junction box. Features twist on fixing for fixing to the ceiling grid with stud bolt M6 (length see table) for fixing of clamp, conduit junction box, etc. spin nut included material: spring steel (type CS70) surface treatment: Delta