JBO Thread Ring Gauge (NoGo) - UNC - Right Hand - 3A - 3/8 x 16 FLH while the left-hand spiral flute

while the left-hand spiral flute with right-hand cutting helps produce smooth

Its HSS-E composition (M35 cobalt) provides enhanced wear resistance when reaming across steel

this reamer follows DIN 8089 and carries a D = ISO H4 tolerance

High-Pressure Coolant Sealed up to 120 bar: Integrated seal delivers reliable coolant delivery during demanding cuts

The tight tolerance ensures consistent hole diameters across components

JBO Thread Ring Gauge (NoGo) - UNC - Right Hand - 3A - 3/8 x 16 FLH while the left-hand spiral fluteThe JBO Thread Ring Gauge (NoGo) is a precision tool designed to verify external threads that use the UNC standard. Sized for 3 8 x 16 and Right Hand orientation, it serves as a dependable reference for quality checks in manufacturing, automotive, and aerospace environments. Its meticulous design ensures accurate, repeatable measurements that help confirm parts meet required thread specifications. Its NoGo design provides an immediate visual