GF Gage G152216 1/4-20 UNC-2B Double End Taperlock Thread Plug Gage
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This GF Gage G152216 is a double-end taperlock thread plug gage for inspecting 1/4-20 UNC-2B internal threads, with a GO member (pitch diameter .2175) on one end and a NOGO member (pitch diameter .2224) on the other. The gage members are mounted in a green hex handle marked with the thread size, class and pitch diameter limits, and the box label identifies it as a GFII taperlock 2B double-end gage under item number 55309959. A GF Gage Certificate of Compliance is included, stating the gage was measured and found in tolerance using masters traceable to NIST, in a 68°F temperature-controlled lab complying with MIL-STD-45662A. This item is new and is used to verify Class 2B internal thread acceptance on 1/4-20 UNC tapped holes.
Product Specifications
| Brand | GF Gage |
| MPN | G152216 |
| Alternate Item Number | 55309959 |
| Thread Size | 1/4-20 UNC |
| Thread Class | 2B |
| Thread Standard | UNC (Unified National Coarse) |
| Thread Type | Internal (checks tapped holes) |
| Threads Per Inch | 20 TPI |
| Gage Type | Double End Taperlock Thread Plug Gage |
| GO Pitch Diameter | .2175 in |
| NOGO Pitch Diameter | .2224 in |
| Ends | GO and NOGO |
| Handle Style | Hex handle, taperlock |
| Handle Color | Green |
| Series | GFII |
| Hand | Right Hand |
| Certification | Certificate of Compliance, NIST traceable |
| Calibration Lab Standard | MIL-STD-45662A |
| Included | Certificate of Compliance |