These custom low head slotted machine screws were manufactured domestically using 12L14 steel material and then run through a commercial black oxide process.  Length under the head was set at .375" +/-.03", fully threaded with 8-32 thread pitch.  The head height was set at .055", diameter at .265", slot width at .05", and slot depth at .042".  Our internal part number for this item is MSF-0806-AF and while lead time varies quite a bit depending on production volume required, we typically budget 6-8 weeks from order confirmation.