JBO Thread Ring Gauge (GO) - UNC - Left Hand - 2A - No. 4 x 40 Widin New this reamer uses a left-hand

this reamer uses a left-hand spiral flute with right-hand cutting and a straight shank for secure clamping

5 right-hand specification to speed up inspections and reduce guesswork

07 mm delivers precise hole finishing for metalworking projects

” that refers to blanks ready to be formed into the reamer

and reduces the need for frequent tool replacements in demanding jobs

JBO Thread Ring Gauge (GO) - UNC - Left Hand - 2A - No. 4 x 40 Widin New this reamer uses a left-handJBO Thread Ring Gauge (GO) UNC Left Hand 2A No. 4 x 40 is a precision inspection tool designed to verify external thread diameters to UNC specifications. Built for engineers, machinists, quality teams, and workshop technicians, it provides a fast, reliable go gauge for confirming thread conformity on lefthand UNC components. Its rugged design and exact dimensions help streamline acceptance testing and reduce rework, even in demanding production