Checked the on-line catalog and no 316 ss. Gave them a call and they say they can get them, but they need to look into it. Some of the marine stores here in hawaii buy their 304 ss hardware from hawaii nut and bolt. Even the west marine catalog seems to mostly carry 304 and in the larger fastener sizes only 304 is available. Many of the 304 hardware I have seen can be picked up by a magnet (even though ss is not supposed to be magnetic), some may be due to high carbon steel content and maybe some due to work hardening.