5/16 X 18 flat faced joint. Fit and finish lead me to believe it's not Asian but who knows?
https://drive.google.com/file/d/0B1Z9gsiU9GccM2t3M2JDN01FMXM/edit?usp=sharing
https://drive.google.com/file/d/0B1Z9gsiU9GccNGVsbkpMbWNJOVE/edit?usp=sharing
https://drive.google.com/file/d/0B1Z9gsiU9GccTWc0dFpiNFo0OUE/edit?usp=sharing
https://drive.google.com/file/d/0B1Z9gsiU9GccaTlqVGtUMXQwWDQ/edit?usp=sharing
https://drive.google.com/file/d/0B1Z9gsiU9GccbjIzMFdoUXdUc0k/edit?usp=sharing
Thanks!
https://drive.google.com/file/d/0B1Z9gsiU9GccM2t3M2JDN01FMXM/edit?usp=sharing
https://drive.google.com/file/d/0B1Z9gsiU9GccNGVsbkpMbWNJOVE/edit?usp=sharing
https://drive.google.com/file/d/0B1Z9gsiU9GccTWc0dFpiNFo0OUE/edit?usp=sharing
https://drive.google.com/file/d/0B1Z9gsiU9GccaTlqVGtUMXQwWDQ/edit?usp=sharing
https://drive.google.com/file/d/0B1Z9gsiU9GccbjIzMFdoUXdUc0k/edit?usp=sharing
Thanks!