DuBro Threaded Insert 4-40 (4) (DUB391)

These are Brass Threaded Inserts from Du-Bro.

FEATURES
Brass threaded inserts.
The perfect way to put threads into wood & mount engines to wood
mounting rails.
Threaded inserts make a simple & effective way to make wing hold
downs.
These can be used where blind nuts are hard to fit.

INCLUDES
(4) Threaded Inserts

SPECIFICATIONS 
Thread Size: 4-40
Length: 7mm