JIS B 4648:2008 PDF

Scope: This Standard specifies the hexagon socket screw keys (hereafter referred to as "screw keys"). Screw keys of this Standard shall be used for tightening of hexagon socket head screws for property class specified in JIS B 1051 and _j.!.S__B___!0_54-!., and for tighten- ing of hexagon socket set screws for property class specified in JIS B 1053 and JIS_B 1054-3. NOTE ~ The International Standard corresponding to this Standard is as follows. ISO 2936: 2001 Assembly tools for screws and nuts--Hexagon socket screw keys (MOD) In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/ IEC Guide 21.

JIS B 4648:2008 Referenced Document

JIS B 1051 Mechanical properties of fasteners made of carbon steel and alloy steel.Bolts, screws and studs with specified property classes.Coarse thread and fine pitch thread*， 2014-09-22 Update
JIS B 1053 Mechanical properties of fasteners made of carbon steel and alloy steel.Set screws and similar threaded fasteners with specified hardness classes.Coarse thread and fine pitch thread*， 2014-09-22 Update
JIS B 1054-1 Mechanical properties of corrosion-resistant stainless steel fasteners .Part 1: Bolts, screws and studs*， 2013-05-20 Update
JIS B 1054-3 Mechanical properties of corrosion-resistant stainless steel fasteners -- Part 3: Set screws and similar fasteners not under tensile stress*， 2013-05-20 Update
JIS Z 2245 Rockwell hardness test -- Test method