Report on JIS B 1188: Fasteners – Hexalobular Socket Head Cap Screws

Why Do You Need the JIS B 1188 PDF?

Standards like JIS B 1188 can typically be purchased from the issuing organization (in this case, likely the Japanese Standards Association) or downloaded from their website or an online standards library.

T1D

: Pan head screw with an external teeth serrated lock washer.