HUMMEL
防松螺母, 黄铜, 镍, M16 x 1.5, 2.8 mm, GM-EMC Series
防松螺母, 黄铜, 镍, M20 x 1.5, 3 mm, GM-EMC Series
防松螺母, 黄铜, 镍, M25 x 1.5, 3.5 mm, GM-EMC Series