hexagonal socket head cap screw 杯头螺丝 ; 圆柱头内六角螺钉 ; 杯螺

socket head cap screw 内六角螺钉 ; 六角螺 ; 沉头螺丝 ; 内六角螺丝

button head cap screw 圆头帽螺钉 ; 圆头螺钉

button-head cap screw 圆头螺钉 ; 圆头帽螺钉

hexagon socket head cap screw 内六角螺丝 ; 内六角圆柱头螺钉

HEX HEAD CAP SCREW 外六角螺栓

round head cap screw 圆头螺钉

bottom head cap screw 美不雅的半圆头螺丝

main valve head cap screw 主阀盖有头螺钉