PL 1 Plate 25.4 mm (1 in) (per 1000 mm width) PL 25.4 1000 25400 199.39 2 Pending verification – nominal dimensions entered by the application developer ASTM A6/A6M (plates) 2026-10-12 UNVERIFIED Reference strip 1000 mm wide: mass per metre equals mass per square metre of plate. Thickness tolerance per ASTM A6/A6M (plates) not included. popular