527 4X1/2 BUTTON HEAD SCREWS
These are 4x1/2" Button Head Sheet Metal Screws by Du-Bro.
FEATURES: Zinc plated metal construction with clear chromate.
Non-slip socket drive insert.
The large head of the screw acts as a washer.
A new design that's great for mounting servos, cowls, landing
gear, etc.
INCLUDES: (8) Screws
SPECS: Length: 1/2"
Diameter: 4mm
COMMENTS: This uses a 1/16" size allen wrench HCAR0520