Engineers
studs are forged steel with a rolled thread. Most have a very small
unthreaded shoulder, as pictured. One size has a large shoulder, see
further info below. They have the same thread either end.
M8 are thread 1.25.
M10 are thread 1.5.
M8 x 45mm - the plain shoulder is 14mm. Threaded ends are 22mm and 8mm.
M10 x 45mm self-colour - the plain shoulder is 11mm. Threaded ends are 26mm and 8mm.