Screw, cylinder head, inch

ASME B18.3 steel alloy plain UNC

ASME 18.3 steel alloy plain UNC (standard thread)

ASME B18.3 Alloy A574 zinc flake silver (ZFSHL)

ASME B18.3 stainless steel 18-8 plain UNF

ASME 18.3, stainless steel 18-8, UNF (fine thread)

ASME B18.3 steel alloy plain UNF

ASME 18.3 steel alloy plain UNF (fine thread)

Screw, cylinder head, inch, others

ASME B18.3 stainless steel 18-8 plain UNC

ASME 18.3, stainless steel 18-8, UNC (standard thread)

ASME B18.3 stainless steel 316 blank UNF

ASME 18.3, stainless steel 316, UNF (fine thread)

ASME B18.3 stainless steel 316 plain UNC

ASME 18.3, stainless steel 316, UNC (standard thread)