Material Free Cutting Brass IS 319 Type (I) or. Free Cutting Brass as per BS 249 Type (I) or. High Grade Free Cutting Brass. Any Special Brass Material Composition as per customers requirement. Threads ISO metric (MM Threads). BA Threads. BSW Threads. UNC & UNF Threads. As per Customers Requirements Finish And Coating Natural, Nickle Plated, Tin Plated or any coating as per customer specification.