/diy/ - Do It Yourself

>>2741821
881 Exists as DIN 7379, i used some as hinges for two thick steel pieces, a kind of jig for something being assembled.

din889 Your almost right in terms of assembly we have machines that use sockets like this for normal screws, its easyer to put onto the head of the bolt automaticly.

SSN-40-HE exists but without the hex head.