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.
| Product Range | Standards | Material | Property Type | Threads | Grade | Mechanical properties |
|---|---|---|---|---|---|---|
| 4 MM to 16 MM | As per costumers requirement. | High Tensile | 4.6 ,5.6 , 5.8 , 8.8 ,10.9 , 12.9 | Metric, BSW, BSF, UNC, UNF, and as per costumers requirement. | SAE 10B21, SAE 15B25, SAE 15B41, AISI 4140,4135, BS-EN8D | As per requirement. |
| Mild Steel | SAE1008 / SAE1010 / SAE 1018 | |||||
| Stainless Steel | A2-70, A4-70,A2-50, A4-50 | SS202, SS304, SS316, SS316L | ||||
| Brass | CUZN 40 / CUZN 37 | |||||
| Copper | C 11000 | |||||
| Phosphorus Bronze | CUSN 4, CUSN 5 | |||||
| Silicon Bronze | CDA65100 |