37a.mm
Brass, 9mm, deep cheese head | 37a.ni1
Nickelled steel, 8mm, cheese head | 37a.br1
Brass plated steel, 8mm, shallower cheese head | 37a.br2
WW1 'economy' nut, thinner |
37a.br
Cheese head, sharp edges, brass plated | 37a.br3
Dome headed, 5-6mm, brass plated | 37a.ni2
Nickel dome head bolts for digger bucket ¹ | 37a.br
Cheese head, sharp edges, brass plated (see above) |
37a.ma
Cheese head, sharp edges, black (Mech.A) | 37a.br
Cheese head, brass plated | 37a.bs
Cheese head, black (Korean) | 37a.zn
Cheese head, zinc plated |