BS Fittings-Locknuts Hexagonal locknut-light Material: Steel Finishing: Electro-Galvanized &Hotdip Galvanized Part Number Size(mm) Hot Dip Galvanized Electro Galvanized LN203-H LN203-G 20 LN253-H LN253-G 25 LN323-H LN323-G 32 LN383-H LN383-G 38 LN503-H LN503-G 50 Hexagonal locknut heavy Material: Steel Finishing: Hotdip Galvanized Part Number Size(mm) LN206-H 20 LN256-H 25 LN326-H 32 LOcking rings Material: Steel Finishing: Electro-Galvanized Part Number Size(mm) LR20-G 20 LR25-G 25 LR32-G 32