This standard specifies a sink milling cutter for hexagon socket head bolts (hereinafter referred to as a milling cutter) used for machining counterbore holes for hexagon socket head bolts with thread nominals M13-M27 as specified in JIS B 1176. .
JIS B 4236:1998 history
2009JIS B 4236 AMD 1:2009 Milling cutters -- Counterbores for hexagon socket head bolts (Amendment 1)
1998JIS B 4236:1998 Milling cutters -- Counterbores for hexagon socket head bolts
1989JIS B 4236:1989 Counterbores for hexagon socket head bolts