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consistent holes at 19
DIN 212‑B
supporting smooth bore finishes and consistent performance across cuts
the arbor provides a rigid
drop-in fit with ISO40 tool holders and repeatable clamping
JBO Thread Ring Gauge (NoGo) - UNEF - Right Hand - 2A - 1/2 x 28 Milling Cutter Arbors consistent holes at 19JBO Thread Ring Gauge (NoGo) UNEF Right Hand 2A 1 2 x 28 is a precision measuring tool designed to verify external thread diameters against Unified thread standards. It is ideal for manufacturers, automotive shops, aerospace maintenance, and quality inspection teams that need fast, reliable checks on threaded components. Thanks to its No Go design, you can quickly identify non conforming threadsif the gauge does not thread on smoothly, the part is out
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