Comparison : Item # C-RING 0-80 UNF GO 2A, 0.0514 Inch, 0-80 UNF 2A GO Thread Ring Gage
Item # C-RING 0-80 UNF GO 3A, 0.0519 Inch, 0-80 UNF 3A GO Thread Ring Gage
Item # C-RING 0-80 UNF NG 2A, 0.0496 Inch, 0-80 UNF 2A NOT GO Thread Ring Gage
Item # C-RING 0-80 UNF NG 3A, 0.0506 Inch, 0-80 UNF 3A NOT GO Thread Ring Gage
Item # C-RING 0-80 UNF SET 2A, 0.0496 to 0.0514 Inch, 0-80 UNF GO & NOT GO Thread Ring Gage