countersunk head

Nails can't dent into metal 120 degree countersunk head semi-tubular rivets

钉子无法钉入金属中。GB/T874-1986120°沉头半空心铆钉

Carriage bolt ( coach bolt): Has a domed or countersunk head, and the shank is topped by a short square section under the head.

马车螺栓（螺栓教练）：有一个圆顶或沉头，而小腿是由简短根据头方节突破。

Slotted raised countersunk head wood screws

GB/T101-1986开槽半沉头木螺钉

Slotted oval countersunk head wood screw

一字槽椭圆沉头木螺丝

Specification: flat head cold-flow model, countersunk head cold-flow model primary drawing mould, pole-shorten model, etc.

规格: 平头冷墩模 、 沉头冷墩模、一序冲顶模 、 缩杆模等.

Hexagon socket head cap screws with countersunk head screws like.

内六角圆柱头螺钉与沉头螺钉相似.