JBO Thread Plug Gauge - UNF Go-No/Go - Left Hand - 2B - 5/8 x 18 ER Collet Chucks and projects where bore accuracy

and projects where bore accuracy matters every time

Hardened steel construction for durability: Built to withstand daily use on busy shop floors

5 mm cutting diameter and a 50 mm overall length

this reamer uses a straight shank for quick

repeatable checks

JBO Thread Plug Gauge - UNF Go-No/Go - Left Hand - 2B - 5/8 x 18 ER Collet Chucks and projects where bore accuracyThe JBO Thread Plug Gauge is a precision inspection tool designed to verify internal UNF threads with confidence. Sized for 5 8 x 18 left hand threads and calibrated to the 2B tolerance class, this go no go gauge helps machinists, QC inspectors, and maintenance technicians confirm hole threads meet Unified standards quickly and reliably. Its compact, hand friendly design makes it suitable for use on the shop floor, in the assembly line, or in the