• DIN6926 Prevailing Torque Type Hexagon Nuts With Flange And With Non Metaric Insert 非金属预置扭矩式六角法兰面防松螺帽

• DIN6927 Prevailing Torque Type Hexagon All-Metal Nut With Flange 金属预置扭矩式六角法兰面防松螺帽

• DIN980M Prevailing Torque Type All-Metal Nut Hexagon Nuts Type M 全金属预置扭矩六角防松螺帽