I have a legacy drawing that calls out a [B]2X [/B][B].250-20 SL[/B], at two holes from a symmetrical centerline.
Does anyone know what "SL" means, or if this is a standard abbreviation?
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I'm not sure about the thread specification - as "SL" normally refers to the screw itself as being "Slotted" Straight.
See: [URL="http://www.engineersedge.com/flat_head_screw.htm"]Flat head Slotted Screw[/URL]
Last edited by Kelly Bramble; 11-13-2013 at 08:13 PM.