Bolt dimension on Halcyon backplate STA?

[AK47Diver]

Anyone know what the dimensions are for the bolts to attach the Single tank adapter to the backplate? I have the removable weighted plate and as I'm about to travel I'm removing the weight but the bolts are integrated to the weight so I need to pick up a set of bolts.

If anyone knows the bolt dimensions or type for attaching the standard Halcyon STA to the backplate I'd appreciate it.

 

[Jay Roy]

5/16-18

 

[AK47Diver]

Thanks! I'll be off to the hardware store to pick some up.

 

[Randy43068]

Stainless...