brass bolt with round head

brass bolts and nuts with round head

黄铜圆头螺栓和螺母

brass-plated mild steel round bead wood screw

镀黄铜圆头软钢木螺丝

Radii under the head of bolts and screws

GB/T3105-1982螺栓和螺钉的头下圆角半径

" Bolts,round head with oval neck"

GB/T8262-1987圆头椭圆颈螺栓

brass-plated mild steel round head machine scre

镀黄铜圆头软钢机器螺丝

Cup head nib bolts

GB/T13-1988半圆头带榫螺栓

Cup head square neck bolts

GB/T12-1988半圆头方颈螺栓

strong oval head square neck bolt

加强半圆头方颈螺栓

Fasteners--Counterbores for hexagon bolts and nuts

GB/T152.4-1988紧固件六角头螺栓和六角螺母用沉孔

" Tolerances for fasteners--Bolts, screws and nuts"

GB/T3103.1-1982紧固件公差螺栓、螺钉和螺母

High strength joint bolts and nuts for rails

GB/T5098-1985钢轨用高强度接头螺栓、螺母

a wrench with a hook that fits over a nut or bolt head.

有一个钩子套在螺母或螺栓头的扳手。

brass-plated mild steel countersunk head wood screw

镀黄铜平头软钢木螺丝

A bolt having a looped head designed to receive a hook or rope.

有眼螺栓带有圆圈头的螺栓,用来接钩子或绳子

A small block of metal or wood with a central, threaded hole that is designed to fit around and secure a bolt or screw.

螺母，螺帽中部有螺纹用于与螺栓或螺钉相配合的小块金属或木头

double-screw bolt

螺柱，双头螺纹螺栓

Bolts and nuts are plated for corrosion resistance.

螺栓和螺母经过电镀防腐蚀处理。

" Plain washers for bolts,screws and nuts--General plan"

GB/T5286-1985螺栓、螺钉和螺母用平垫圈总方案