Lee Plugs and Pins are made from materials that fall within the overall limits of the specifications shown in this website. In fact, The Lee Company exclusively purchases mill runs of material controlled to closer physical and chemical limits per Lee Company specification. We do not approve the use of material meeting only the 416 specification.
Lee Plug Materials:
2024-T4 or T351
7075-T6 or T651
R405 (long sizes only)
In addition, Lee Plugs are available in 2024-T6 Aluminum, 6061-T6 Aluminum, 316 CRES and 6AL-4V Titanium.
Contact your Lee Sales Engineer for additional information on these alternate materials.