bolt
cap
circle
clincher
construction
cross
design
detail
element
fastener
fastening
flat
glossy
gray
hardware
head
hex
hexahedron
icon
illustration
industrial
industry
iron
isolated
metal
metallic
nail
object
repair
rivet
round
screw
screwdriver
set
shape
shiny
silver
stainless
steel
symbol
template
tool
top
work
zinc