PART NO.  SPL.PAGE  DESCRIPTION                                                            
CLS2512   TC.A.21   Stud for carburetor (8) -(inlet manifold, engine, Twin Cam)

CLS2512 Stud is item #3 below (8), used to secure carburetors to inlet manifold (Twin Cam engine).
High strength stud (55-ton).
Length = 1-1/2"
Top end thread = 5/16-24-UNF x 5/8"
Bottom end thread = 5/16-18-UNC x 15/32"
Notice that original CHSxxxx studs have short dog point on top end, which males it very easy to start the nut.
CLSxxxx studs may not have the dog point.
A leading "0" means plain stud. -- A leading "2" means zinc plated.