Precise Black Oxide Steel Pin Gage Sets

• Black oxide coating protects against rust and corrosion which extends plug gage life
• Black coating can also serve as an indicator for wear and tear to timely renew the plug gage calibration
• Class ZZ tolerance, Minus Accuracy: +.0000 -.0002
• Class ZZ tolerance, Plus Accuracy: -.0000 +.0002
• .001 Set increment
• Heat treated to a hardness of 60/62 HRc
• Uniform 2″ overall length and within .0002″ round
• Each set includes a pin gage handle.