SPI Threaded Ring Gage: 5/16-24 Thread, Class 2A, Go & No Go 23-159-7 SKU: DBI46554093

FOWLER 0.2 to 0.59 Inch, Inside Electronic Caliper Gage 54-554-611-0 SKU: DBI73085771

GREENLEE Draw Stud 00042 SKU: DBI60062601