Great Planes 1/4-20 Brass Inserts

FEATURES: Brass construction
The perfect way to put threads into wood and mount engines to wood
mounting rails. Threaded inserts make a simple & effective way to
make wing hold downs.
Can be used where blind nuts are hard to fit
Comes in a Parts-Pak clear plastic box with resealable lid
One year quality guarantee

REQUIRES: 5/16" Drill Size (package says 3/8 but that is too large)
Epoxy
Standard Slotted Screwdriver (-)

SPECS: Thread Size: 1/4-20
Length: 1/2"
Diameter: 3/8" OD overall
5/16" OD of main body

COMMENTS: Package says it threads into a 3/8" hole. But it threads into a 5/16"
diameter hole that is 1/2" deep.