Male/Female Threaded Standoffs Keystone Electronics Male/Female Threaded Standoffs offer three ranges of thread sizes, various metal options, and a Nylon version. These standoffs come in stainless steel, brass with nickel plating, or aluminum with clear Iridite plating options. Keystone Male/Female Threaded Standoffs have a hex or round design and are available in 4-40, 6-32, and 8-32 thread sizes.