Slotted head screws
This Japanese Industrial Standard specifies the steel slotted head screws (hereafter, referred to as “steel screws”) , stainless steel slotted head screws (hereafter referred to as “stainless steel screws”) and nonferrous metal slotted head screws (hereafter referred to as “nonferrous metal screws”) for general use.

Check out other specifications
SCREW THREAD GAGING SYSTEMS FOR ACCEPTABILITY: INCH AND METRIC SCREW THREADS (UN, UNR, UNJ, M, AND MJ)
FASTENERS FOR USE IN STRUCTURAL APPLICATIONS
COMPRESSIBLE-WASHER-TYPE DIRECT TENSION INDICATORS FOR USE WITH STRUCTURAL FASTENERS [METRIC]
STEEL SELF-PIERCING TAPPING SCREWS FOR THE APPLICATION OF GYPSUM PANEL PRODUCTS OR METAL PLASTER BASES TO WOOD STUDS OR STEEL STUDS
Standard Specification for Hardened Steel Washers [Metric]
Knurled nuts