Main > Main Forum
Black carriage bolts
<< < (2/2)
DeLuSioNal29:
Tornado Terry's also carries them.
divemaster127:
im sorry I am not sure what you mean by "sems"
Sir Headless VII:
"Nut 10-24 hex w/SEMS - Subtract $0.10" from your store. Anyways from elsewhere on the net

SEMS
A screw and washer assembly. A screw or bolt which has a captive washer. The washer is frequently loose on the plain shank of the fastener, the shank diameter being equal to the effective diameter of the thread; the thread being rolled from this diameter. The origin of the word is a frequent question. In the 1930's E. C. Crowther was a representative for a company that sold both shakeproof washers and screws. He came up with the idea of placing the washer on the screw before it was thread rolled. The major diameter of the screw being larger than the washer hole prevents it from coming off. The Illinois Tool Works made machines that produced these patented pre-asSEMbled washers and screws. The s at the end of SEMs is thought to have been subsequently picked up because they are not usually purchased individually. In spite of the original patents and trademarks the word SEMS is generally recognised as a generic term applicable to screw and washer assemblies.
planetjay:
Also see SEMS. In this case it most likely has an attached but free spinning star washer. All mine do anyway. I got mine Here.
Navigation
Message Index
Previous page

Go to full version