Collar Bolt

Collars bolts are utilized for removable pack heat exchangers, to holding the group set up, if by some stroke of good luck the channel should be taken out. Roughly 25%, with at least four, of the rib studs, will be Collar Bolts, to keep the group set up. All Collar Bolts will have a square expansion past the strings for utilization of a wrench to forestall turning of the fastener when the nuts are fixed or taken out.