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