The stainless steel TecNec 12S Pan-Head Screws with Nut & Washers Kit from B&H features a 100-pack of TecNec 1/2" pan-head screws and a 100-pack of 4-40 nuts with star washers. The kit can be used for mounting all chassis connectors in panels and plates. In addition, use pan-head screws for back-panel mounting.
These stainless steel SCREW-12S 4-40 x 1/2" Pan-Head Screws from TecNec are for mounting chassis-mount connectors in back panels and plates. They are particularly suitable for Neutrik D-series panel-mount connectors. They come 100 to a pack.
The NUT-CMT from TecNec comprises a pack of 100 4-40 thread hardware nuts with their included star washers. These can be used for mounting compatible-sized chassis connectors in panels and plates.