Umm, from what I've read, some of the L grades do not contain lead, like 316L.
AISI 316L stainless steel is an modified ultra-low carbon austenitic stainless steel properties, composition, tensile yield strength
www.theworldmaterial.com
I do know lead is more common now in alloys than in past years. I fear for our health in that respect. For example, 12L14.
SAE AISI 12L14 steel is a resulfurized, rephosphorized & lead containing free-machining carbon steel, equivalent material is 10SPb20, SUM24L
www.theworldmaterial.com
It seems to me that we're very likely to handle screws, which is what 12L14 alloy is used for according to this site.
Discover 12L14 steel, the fastest machining carbon steel grade, perfect for high-volume production of screws and fasteners. Learn its properties and applications here.
www.ryerson.com