PMPA Buyer's Guide - Information on how to reduce costs on cnc and screw machined parts.
Metal Suppliers Online's Research Tools - Instant access to periodic tables, conversion charts, size and specifications, material property data, and trade names.
Why Brass Screw Machine Parts are Cheaper than Steel by Copper Development Association. They also have case histories of screw machine products which have been converted from leaded free-machining steel to free-cutting brass available for purchase.
Key to Steel Database by Key to Metals Task Force is a unique global steel properties database. Includes more than 40000 steel alloys and 600000+ records from 32 countries all over the world.
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Free Gift - Information on how to obtain the free Gift of Salvation