followed by final tightening
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Bolts used for fastening bearing caps, they ensure correct operation of the engine crankshaft. Bolts used for fastening the various components of the lower part of the engine and which constitute half of the main bearings (main bearing caps, half blocks, complete banks).

https://www.hi-force.com/en-uk/blog-details/2/torque-vs-tens...

Main Bearing Cap Bolts
The main caps secure the bearings that hold your crankshaft in place. Different engine designs (SBF, BBF, SBC, BBC, LS, Coyote, etc.) use different quantities of main caps, and those caps are held down by main bearing cap bolts. In addition, 2-bolt main caps are common, but 4-bolt mains and 6-bolt mains may be used in high-powered engines for extra strength. Whether you need complete sets of studs and cross-bolts for a new engine build, or just partial sets for upgrades and repairs, you can find the main cap fasteners you need at Summit Racing Equipment.
https://www.summitracing.com/search/part-type/main-cap-faste...