bagul703,
ASTM A194 is the standard for nuts, not for bolts. There is no grade 4M, only grade 4 or grade 7M, if you have to have the "M" included in the grade. Please review the ASTM A194 specification for nuts and the specification ASTM A193 for bolts.
Many people on this forum can guide you in the selection of the bolts and nuts, provided that you would detail the application, environment, service conditions for these fasteners. Please provide details.
cheers,
gr2vessels