UM-TYPE ER-32 COLLET CHUCK NUT (3900-0691)

UM-Type ER-32 Collect Chuck Nut Balanced to 18,000 RPM Tolerance is .0003" Maximum Material is 42 CrMo Hardness is HRC 50-52 Thread Tolerance Class is 4H-Class Thread is M40 X 1.5 D is 50 mm L is 22.5 mm Shipping Weight: 0.3 lbs