Insize Internal Thread Crest Diameter Measuring Instruments
Measure the crest diameter of Internal thread with nominal diameter larger than 2 3/8"(60.325mm) and less than 20" (508mm)

| Item No. | L | A1 | A2 |
| 2237-5 | 10.236" | 4.409" | 3.583" |
| 2237-5E | 10.236" | 4.409" | 3.583" |
| 2237-20 | 12", 18" or 24"* | 6.969" | 7.165" |
*Select suitable length of arm according to workpieces
For more info, visit www.p65warnings.ca.gov.
